forked from OSchip/llvm-project
39 lines
944 B
LLVM
39 lines
944 B
LLVM
; RUN: llc < %s -march=x86 | FileCheck %s
|
|
|
|
declare {i32, i1} @llvm.umul.with.overflow.i32(i32 %a, i32 %b)
|
|
define zeroext i1 @a(i32 %x) nounwind {
|
|
%res = call {i32, i1} @llvm.umul.with.overflow.i32(i32 %x, i32 3)
|
|
%obil = extractvalue {i32, i1} %res, 1
|
|
ret i1 %obil
|
|
|
|
; CHECK-LABEL: a:
|
|
; CHECK: mull
|
|
; CHECK: seto %al
|
|
; CHECK: movzbl %al, %eax
|
|
; CHECK: ret
|
|
}
|
|
|
|
define i32 @test2(i32 %a, i32 %b) nounwind readnone {
|
|
entry:
|
|
%tmp0 = add i32 %b, %a
|
|
%tmp1 = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %tmp0, i32 2)
|
|
%tmp2 = extractvalue { i32, i1 } %tmp1, 0
|
|
ret i32 %tmp2
|
|
; CHECK-LABEL: test2:
|
|
; CHECK: addl
|
|
; CHECK-NEXT: addl
|
|
; CHECK-NEXT: ret
|
|
}
|
|
|
|
define i32 @test3(i32 %a, i32 %b) nounwind readnone {
|
|
entry:
|
|
%tmp0 = add i32 %b, %a
|
|
%tmp1 = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %tmp0, i32 4)
|
|
%tmp2 = extractvalue { i32, i1 } %tmp1, 0
|
|
ret i32 %tmp2
|
|
; CHECK-LABEL: test3:
|
|
; CHECK: addl
|
|
; CHECK: mull
|
|
; CHECK-NEXT: ret
|
|
}
|