92 lines
3.2 KiB
LLVM
92 lines
3.2 KiB
LLVM
; RUN: llc < %s -relocation-model=static -mcpu=yonah | FileCheck %s
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; The double argument is at 4(esp) which is 16-byte aligned, but we
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; are required to read in extra bytes of memory in order to fold the
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; load. Bad Things may happen when reading/processing undefined bytes,
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; so don't fold the load.
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; PR22371 / http://reviews.llvm.org/D7474
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i686-apple-darwin8"
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@G = external global double
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define void @test({ double, double }* byval %z, double* %P) nounwind {
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entry:
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%tmp3 = load double, double* @G, align 16 ; <double> [#uses=1]
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%tmp4 = tail call double @fabs( double %tmp3 ) readnone ; <double> [#uses=1]
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store volatile double %tmp4, double* %P
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%tmp = getelementptr { double, double }, { double, double }* %z, i32 0, i32 0 ; <double*> [#uses=1]
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%tmp1 = load volatile double, double* %tmp, align 8 ; <double> [#uses=1]
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%tmp2 = tail call double @fabs( double %tmp1 ) readnone ; <double> [#uses=1]
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%tmp6 = fadd double %tmp4, %tmp2 ; <double> [#uses=1]
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store volatile double %tmp6, double* %P, align 8
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ret void
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; CHECK-LABEL: test:
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; CHECK: movsd {{.*}}G, %xmm{{.*}}
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; CHECK: andpd %xmm{{.*}}, %xmm{{.*}}
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; CHECK: movsd 4(%esp), %xmm{{.*}}
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; CHECK: andpd %xmm{{.*}}, %xmm{{.*}}
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}
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define void @test2() alignstack(16) nounwind {
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entry:
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; CHECK-LABEL: test2:
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; CHECK: andl{{.*}}$-16, %esp
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ret void
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}
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; Use a call to force a spill.
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define <2 x double> @test3(<2 x double> %x, <2 x double> %y) alignstack(32) nounwind {
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entry:
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; CHECK-LABEL: test3:
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; CHECK: andl{{.*}}$-32, %esp
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call void @test2()
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%A = fmul <2 x double> %x, %y
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ret <2 x double> %A
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}
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declare double @fabs(double)
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; The pointer is already known aligned, so and x,-16 is eliminable.
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define i32 @test4() nounwind {
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entry:
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%buffer = alloca [2048 x i8], align 16
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%0 = ptrtoint [2048 x i8]* %buffer to i32
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%and = and i32 %0, -16
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ret i32 %and
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; CHECK-LABEL: test4:
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; CHECK-NOT: and
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; CHECK: ret
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}
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%struct.sixteen = type { [16 x i8] }
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; Accessing stack parameters shouldn't assume stack alignment. Here we should
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; emit two 8-byte loads, followed by two 8-byte stores.
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define x86_stdcallcc void @test5(%struct.sixteen* byval nocapture readonly align 4 %s) #0 {
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%d.sroa.0 = alloca [16 x i8], align 1
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%1 = getelementptr inbounds [16 x i8], [16 x i8]* %d.sroa.0, i32 0, i32 0
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call void @llvm.lifetime.start(i64 16, i8* %1)
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%2 = getelementptr inbounds %struct.sixteen, %struct.sixteen* %s, i32 0, i32 0, i32 0
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* %2, i32 16, i32 1, i1 true)
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call void @llvm.lifetime.end(i64 16, i8* %1)
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ret void
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; CHECK-LABEL: test5:
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; CHECK: and
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; CHECK: movsd
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; CHECK-NEXT: movsd
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; CHECK-NEXT: movsd
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; CHECK-NEXT: movsd
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}
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declare void @llvm.lifetime.start(i64, i8* nocapture) argmemonly nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) argmemonly nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) argmemonly nounwind
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attributes #0 = { nounwind alignstack=16 "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
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