519 lines
18 KiB
LLVM
519 lines
18 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mcpu=generic -mtriple=i386-apple-darwin -verify-machineinstrs -no-integrated-as | FileCheck %s
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; There should be no stack manipulations between the inline asm and ret.
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define x86_fp80 @test1() {
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; CHECK-LABEL: test1:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fld0
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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%tmp85 = call x86_fp80 asm sideeffect "fld0", "={st(0)}"()
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ret x86_fp80 %tmp85
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}
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define double @test2() {
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; CHECK-LABEL: test2:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fld0
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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%tmp85 = call double asm sideeffect "fld0", "={st(0)}"()
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ret double %tmp85
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}
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; Setting up argument in st(0) should be a single fld.
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; Asm consumes stack, nothing should be popped.
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define void @test3(x86_fp80 %X) {
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; CHECK-LABEL: test3:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: frob
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( x86_fp80 %X)
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ret void
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}
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define void @test4(double %X) {
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; CHECK-LABEL: test4:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: frob
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( double %X)
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ret void
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}
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; Same as test3/4, but using value from fadd.
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; The fadd can be done in xmm or x87 regs - we don't test that.
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define void @test5(double %X) {
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; CHECK-LABEL: test5:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: fadds LCPI4_0
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: frob
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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%Y = fadd double %X, 123.0
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call void asm sideeffect "frob ", "{st(0)},~{st},~{dirflag},~{fpsr},~{flags}"( double %Y)
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ret void
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}
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define void @test6(double %A, double %B, double %C, double %D, double %E) nounwind {
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; CHECK-LABEL: test6:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldl {{[0-9]+}}(%esp)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: foo %st(0) %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: bar %st(1) %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(1)
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: baz %st(1) %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: baz %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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; Uses the same value twice, should have one fstp after the asm.
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tail call void asm sideeffect "foo $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %A, double %A ) nounwind
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; Uses two different values, should be in st(0)/st(1) and both be popped.
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tail call void asm sideeffect "bar $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %B, double %C ) nounwind
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; Uses two different values, one of which isn't killed in this asm, it should not be popped after the asm.
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tail call void asm sideeffect "baz $0 $1", "f,f,~{dirflag},~{fpsr},~{flags}"( double %D, double %E ) nounwind
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; This is the last use of %D, so it should be popped after.
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tail call void asm sideeffect "baz $0", "f,~{dirflag},~{fpsr},~{flags}"( double %D ) nounwind
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ret void
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}
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; PR4185
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; Passing a non-killed value to asm in {st}.
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; Make sure it is duped before.
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; asm kills st(0), so we shouldn't pop anything
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; A valid alternative would be to remat the constant pool load before each
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; inline asm.
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define void @testPR4185() {
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; CHECK-LABEL: testPR4185:
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; CHECK: ## %bb.0: ## %return
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; CHECK-NEXT: flds LCPI6_0
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; CHECK-NEXT: fld %st(0)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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return:
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call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
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call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
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ret void
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}
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; Passing a non-killed value through asm in {st}.
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; Make sure it is not duped before.
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; Second asm kills st(0), so we shouldn't pop anything
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; A valid alternative would be to remat the constant pool load before each inline asm.
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define void @testPR4185b() {
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; CHECK-LABEL: testPR4185b:
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; CHECK: ## %bb.0: ## %return
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; CHECK-NEXT: flds LCPI7_0
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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return:
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call void asm sideeffect "fistl $0", "{st}"(double 1.000000e+06)
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call void asm sideeffect "fistpl $0", "{st},~{st}"(double 1.000000e+06)
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ret void
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}
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; PR4459
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; The return value from ceil must be duped before being consumed by asm.
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define void @testPR4459(x86_fp80 %a) {
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; CHECK-LABEL: testPR4459:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: subl $28, %esp
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fstpt (%esp)
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; CHECK-NEXT: calll _ceil
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; CHECK-NEXT: fld %st(0)
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; CHECK-NEXT: fxch %st(1)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstpt (%esp)
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; CHECK-NEXT: calll _test3
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; CHECK-NEXT: addl $28, %esp
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; CHECK-NEXT: retl
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entry:
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%0 = call x86_fp80 @ceil(x86_fp80 %a)
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call void asm sideeffect "fistpl $0", "{st},~{st}"( x86_fp80 %0)
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call void @test3(x86_fp80 %0 )
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ret void
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}
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declare x86_fp80 @ceil(x86_fp80)
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; PR4484
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; test1 leaves a value on the stack that is needed after the asm.
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; Load %a from stack after ceil
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; Set up call to test.
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define void @testPR4484(x86_fp80 %a) {
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; CHECK-LABEL: testPR4484:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: subl $28, %esp
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fstpt {{[0-9]+}}(%esp) ## 10-byte Folded Spill
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; CHECK-NEXT: calll _test1
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp) ## 10-byte Folded Reload
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstpt (%esp)
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; CHECK-NEXT: calll _test3
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; CHECK-NEXT: addl $28, %esp
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; CHECK-NEXT: retl
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entry:
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%0 = call x86_fp80 @test1()
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call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %a)
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call void @test3(x86_fp80 %0)
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ret void
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}
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; PR4485
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define void @testPR4485(x86_fp80* %a) {
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; CHECK-LABEL: testPR4485:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: fldt (%eax)
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; CHECK-NEXT: flds LCPI10_0
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; CHECK-NEXT: fmul %st(0), %st(1)
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; CHECK-NEXT: flds LCPI10_1
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; CHECK-NEXT: fmul %st(0), %st(2)
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; CHECK-NEXT: fxch %st(2)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fldt (%eax)
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; CHECK-NEXT: fmulp %st(1)
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; CHECK-NEXT: fmulp %st(1)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistpl %st(0)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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entry:
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%0 = load x86_fp80, x86_fp80* %a, align 16
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%1 = fmul x86_fp80 %0, 0xK4006B400000000000000
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%2 = fmul x86_fp80 %1, 0xK4012F424000000000000
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tail call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %2)
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%3 = load x86_fp80, x86_fp80* %a, align 16
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%4 = fmul x86_fp80 %3, 0xK4006B400000000000000
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%5 = fmul x86_fp80 %4, 0xK4012F424000000000000
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tail call void asm sideeffect "fistpl $0", "{st},~{st}"(x86_fp80 %5)
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ret void
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}
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; An input argument in a fixed position is implicitly popped by the asm only if
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; the input argument is tied to an output register, or it is in the clobber list.
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; The clobber list case is tested above.
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;
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; This doesn't implicitly pop the stack:
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;
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; void fist1(long double x, int *p) {
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; asm volatile ("fistl %1" : : "t"(x), "m"(*p));
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; }
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define void @fist1(x86_fp80 %x, i32* %p) nounwind ssp {
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; CHECK-LABEL: fist1:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistl (%eax)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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tail call void asm sideeffect "fistl $1", "{st},*m,~{memory},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, i32* %p) nounwind
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ret void
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}
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; Here, the input operand is tied to an output which means that is is
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; implicitly popped (and then the output is implicitly pushed).
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;
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; long double fist2(long double x, int *p) {
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; long double y;
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; asm ("fistl %1" : "=&t"(y) : "0"(x), "m"(*p) : "memory");
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; return y;
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; }
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define x86_fp80 @fist2(x86_fp80 %x, i32* %p) nounwind ssp {
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; CHECK-LABEL: fist2:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fistl (%eax)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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%0 = tail call x86_fp80 asm "fistl $2", "=&{st},0,*m,~{memory},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, i32* %p) nounwind
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ret x86_fp80 %0
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}
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; An 'f' constraint is never implicitly popped:
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;
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; void fucomp1(long double x, long double y) {
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; asm volatile ("fucomp %1" : : "t"(x), "f"(y) : "st");
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; }
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define void @fucomp1(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
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; CHECK-LABEL: fucomp1:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fxch %st(1)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fucomp %st(1)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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tail call void asm sideeffect "fucomp $1", "{st},f,~{st},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
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ret void
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}
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; The 'u' constraint is only popped implicitly when clobbered:
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;
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; void fucomp2(long double x, long double y) {
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; asm volatile ("fucomp %1" : : "t"(x), "u"(y) : "st");
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; }
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;
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; void fucomp3(long double x, long double y) {
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; asm volatile ("fucompp %1" : : "t"(x), "u"(y) : "st", "st(1)");
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; }
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;
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define void @fucomp2(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
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; CHECK-LABEL: fucomp2:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fxch %st(1)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fucomp %st(1)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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tail call void asm sideeffect "fucomp $1", "{st},{st(1)},~{st},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
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ret void
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}
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define void @fucomp3(x86_fp80 %x, x86_fp80 %y) nounwind ssp {
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; CHECK-LABEL: fucomp3:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fldt {{[0-9]+}}(%esp)
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; CHECK-NEXT: fxch %st(1)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: fucompp %st(1)
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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tail call void asm sideeffect "fucompp $1", "{st},{st(1)},~{st},~{st(1)},~{dirflag},~{fpsr},~{flags}"(x86_fp80 %x, x86_fp80 %y) nounwind
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ret void
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}
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; One input, two outputs, one dead output.
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%complex = type { float, float }
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define float @sincos1(float %x) nounwind ssp {
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; CHECK-LABEL: sincos1:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: flds {{[0-9]+}}(%esp)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: sincos
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(1)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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%0 = tail call %complex asm "sincos", "={st},={st(1)},0,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
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%asmresult = extractvalue %complex %0, 0
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ret float %asmresult
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}
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; Same thing, swapped output operands.
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define float @sincos2(float %x) nounwind ssp {
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; CHECK-LABEL: sincos2:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: flds {{[0-9]+}}(%esp)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: sincos
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(1)
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; CHECK-NEXT: retl
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; CHECK-NEXT: ## -- End function
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entry:
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%0 = tail call %complex asm "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
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%asmresult = extractvalue %complex %0, 1
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ret float %asmresult
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}
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; Clobber st(0) after it was live-out/dead from the previous asm.
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; Load x, make a copy for the second asm.
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; Discard dead result in st(0), bring x to the top.
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; x is now in st(0) for the second asm
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; Discard both results.
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define float @sincos3(float %x) nounwind ssp {
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; CHECK-LABEL: sincos3:
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; CHECK: ## %bb.0: ## %entry
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; CHECK-NEXT: flds {{[0-9]+}}(%esp)
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; CHECK-NEXT: fld %st(0)
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; CHECK-NEXT: ## InlineAsm Start
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; CHECK-NEXT: sincos
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; CHECK-NEXT: ## InlineAsm End
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; CHECK-NEXT: fstp %st(0)
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; CHECK-NEXT: fxch %st(1)
|
|
; CHECK-NEXT: ## InlineAsm Start
|
|
; CHECK-NEXT: sincos
|
|
; CHECK-NEXT: ## InlineAsm End
|
|
; CHECK-NEXT: fstp %st(1)
|
|
; CHECK-NEXT: fstp %st(0)
|
|
; CHECK-NEXT: retl
|
|
; CHECK-NEXT: ## -- End function
|
|
entry:
|
|
%0 = tail call %complex asm sideeffect "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
|
|
%1 = tail call %complex asm sideeffect "sincos", "={st(1)},={st},1,~{dirflag},~{fpsr},~{flags}"(float %x) nounwind
|
|
%asmresult = extractvalue %complex %0, 0
|
|
ret float %asmresult
|
|
}
|
|
|
|
; Pass the same value in two fixed stack slots.
|
|
define i32 @PR10602() nounwind ssp {
|
|
; CHECK-LABEL: PR10602:
|
|
; CHECK: ## %bb.0: ## %entry
|
|
; CHECK-NEXT: flds LCPI19_0
|
|
; CHECK-NEXT: fld %st(0)
|
|
; CHECK-NEXT: fxch %st(1)
|
|
; CHECK-NEXT: ## InlineAsm Start
|
|
; CHECK-NEXT: fcomi %st(1), %st(0); pushf; pop %eax
|
|
; CHECK-NEXT: ## InlineAsm End
|
|
; CHECK-NEXT: fstp %st(0)
|
|
; CHECK-NEXT: fstp %st(0)
|
|
; CHECK-NEXT: retl
|
|
; CHECK-NEXT: ## -- End function
|
|
entry:
|
|
%0 = tail call i32 asm "fcomi $2, $1; pushf; pop $0", "=r,{st},{st(1)},~{dirflag},~{fpsr},~{flags}"(double 2.000000e+00, double 2.000000e+00) nounwind
|
|
ret i32 %0
|
|
}
|
|
|
|
; <rdar://problem/16952634>
|
|
; X87 stackifier asserted when there was an ST register defined by an
|
|
; inline-asm instruction and the ST register was live across another
|
|
; inline-asm instruction.
|
|
;
|
|
; INLINEASM $frndint [sideeffect] [attdialect], $0:[regdef], %st0<imp-def,tied5>, $1:[reguse tiedto:$0], %st0<tied3>, $2:[clobber], early-clobber implicit dead %eflags
|
|
; INLINEASM $fldcw $0 [sideeffect] [mayload] [attdialect], $0:[mem], undef %eax, 1, %noreg, 0, %noreg, $1:[clobber], early-clobber implicit dead %eflags
|
|
; %fp0 = COPY %st0
|
|
|
|
%struct.fpu_t = type { [8 x x86_fp80], x86_fp80, %struct.anon1, %struct.anon2, i32, i8, [15 x i8] }
|
|
%struct.anon1 = type { i32, i32, i32 }
|
|
%struct.anon2 = type { i32, i32, i32, i32 }
|
|
|
|
@fpu = external global %struct.fpu_t, align 16
|
|
|
|
; Function Attrs: ssp
|
|
define void @test_live_st(i32 %a1) {
|
|
; CHECK-LABEL: test_live_st:
|
|
; CHECK: ## %bb.0: ## %entry
|
|
; CHECK-NEXT: subl $12, %esp
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 16
|
|
; CHECK-NEXT: fldt (%eax)
|
|
; CHECK-NEXT: cmpl $1, {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: jne LBB20_2
|
|
; CHECK-NEXT: ## %bb.1: ## %sw.bb4.i
|
|
; CHECK-NEXT: ## InlineAsm Start
|
|
; CHECK-NEXT: frndint
|
|
; CHECK-NEXT: ## InlineAsm End
|
|
; CHECK-NEXT: ## InlineAsm Start
|
|
; CHECK-NEXT: fldcw (%eax)
|
|
; CHECK-NEXT: ## InlineAsm End
|
|
; CHECK-NEXT: LBB20_2: ## %_Z5tointRKe.exit
|
|
; CHECK-NEXT: fnstcw {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: movzwl {{[0-9]+}}(%esp), %eax
|
|
; CHECK-NEXT: movw $3199, {{[0-9]+}}(%esp) ## imm = 0xC7F
|
|
; CHECK-NEXT: fldcw {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: movw %ax, {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: fistpl {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: fldcw {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: fildl {{[0-9]+}}(%esp)
|
|
; CHECK-NEXT: movl L_fpu$non_lazy_ptr, %eax
|
|
; CHECK-NEXT: fstpt 128(%eax)
|
|
; CHECK-NEXT: addl $12, %esp
|
|
; CHECK-NEXT: retl
|
|
entry:
|
|
%0 = load x86_fp80, x86_fp80* undef, align 16
|
|
%cond = icmp eq i32 %a1, 1
|
|
br i1 %cond, label %sw.bb4.i, label %_Z5tointRKe.exit
|
|
|
|
sw.bb4.i:
|
|
%1 = call x86_fp80 asm sideeffect "frndint", "={st},0,~{dirflag},~{fpsr},~{flags}"(x86_fp80 %0)
|
|
call void asm sideeffect "fldcw $0", "*m,~{dirflag},~{fpsr},~{flags}"(i32* undef)
|
|
br label %_Z5tointRKe.exit
|
|
|
|
_Z5tointRKe.exit:
|
|
%result.0.i = phi x86_fp80 [ %1, %sw.bb4.i ], [ %0, %entry ]
|
|
%conv.i1814 = fptosi x86_fp80 %result.0.i to i32
|
|
%conv626 = sitofp i32 %conv.i1814 to x86_fp80
|
|
store x86_fp80 %conv626, x86_fp80* getelementptr inbounds (%struct.fpu_t, %struct.fpu_t* @fpu, i32 0, i32 1)
|
|
br label %return
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
; Check that x87 stackifier is correctly rewriting FP registers to ST registers.
|
|
define double @test_operand_rewrite() {
|
|
; CHECK-LABEL: test_operand_rewrite:
|
|
; CHECK: ## %bb.0: ## %entry
|
|
; CHECK-NEXT: ## InlineAsm Start
|
|
; CHECK-NEXT: foo %st(0), %st(1)
|
|
; CHECK-NEXT: ## InlineAsm End
|
|
; CHECK-NEXT: fsubp %st(1)
|
|
; CHECK-NEXT: retl
|
|
entry:
|
|
%0 = tail call { double, double } asm sideeffect "foo $0, $1", "={st},={st(1)},~{dirflag},~{fpsr},~{flags}"()
|
|
%asmresult = extractvalue { double, double } %0, 0
|
|
%asmresult1 = extractvalue { double, double } %0, 1
|
|
%sub = fsub double %asmresult, %asmresult1
|
|
ret double %sub
|
|
}
|