diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2015-05-27 18:44:32 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2015-05-27 18:44:32 +0000 |
| commit | 5a5ac124e1efaf208671f01c46edb15f29ed2a0b (patch) | |
| tree | a6140557876943cdd800ee997c9317283394b22c /test/CodeGen/X86/stack-align.ll | |
| parent | f03b5bed27d0d2eafd68562ce14f8b5e3f1f0801 (diff) | |
Diffstat (limited to 'test/CodeGen/X86/stack-align.ll')
| -rw-r--r-- | test/CodeGen/X86/stack-align.ll | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/test/CodeGen/X86/stack-align.ll b/test/CodeGen/X86/stack-align.ll index eafb7c29fa0a..0cff95f266a9 100644 --- a/test/CodeGen/X86/stack-align.ll +++ b/test/CodeGen/X86/stack-align.ll @@ -1,7 +1,10 @@ ; RUN: llc < %s -relocation-model=static -mcpu=yonah | FileCheck %s -; The double argument is at 4(esp) which is 16-byte aligned, allowing us to -; fold the load into the andpd. +; The double argument is at 4(esp) which is 16-byte aligned, but we +; are required to read in extra bytes of memory in order to fold the +; load. Bad Things may happen when reading/processing undefined bytes, +; so don't fold the load. +; PR22371 / http://reviews.llvm.org/D7474 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" target triple = "i686-apple-darwin8" @@ -9,28 +12,37 @@ target triple = "i686-apple-darwin8" define void @test({ double, double }* byval %z, double* %P) nounwind { entry: - %tmp3 = load double* @G, align 16 ; <double> [#uses=1] + %tmp3 = load double, double* @G, align 16 ; <double> [#uses=1] %tmp4 = tail call double @fabs( double %tmp3 ) readnone ; <double> [#uses=1] store volatile double %tmp4, double* %P - %tmp = getelementptr { double, double }* %z, i32 0, i32 0 ; <double*> [#uses=1] - %tmp1 = load volatile double* %tmp, align 8 ; <double> [#uses=1] + %tmp = getelementptr { double, double }, { double, double }* %z, i32 0, i32 0 ; <double*> [#uses=1] + %tmp1 = load volatile double, double* %tmp, align 8 ; <double> [#uses=1] %tmp2 = tail call double @fabs( double %tmp1 ) readnone ; <double> [#uses=1] - ; CHECK: andpd{{.*}}4(%esp), %xmm %tmp6 = fadd double %tmp4, %tmp2 ; <double> [#uses=1] store volatile double %tmp6, double* %P, align 8 ret void + +; CHECK-LABEL: test: +; CHECK: movsd {{.*}}G, %xmm{{.*}} +; CHECK: andpd %xmm{{.*}}, %xmm{{.*}} +; CHECK: movsd 4(%esp), %xmm{{.*}} +; CHECK: andpd %xmm{{.*}}, %xmm{{.*}} + + } define void @test2() alignstack(16) nounwind { entry: - ; CHECK: andl{{.*}}$-16, %esp +; CHECK-LABEL: test2: +; CHECK: andl{{.*}}$-16, %esp ret void } ; Use a call to force a spill. define <2 x double> @test3(<2 x double> %x, <2 x double> %y) alignstack(32) nounwind { entry: - ; CHECK: andl{{.*}}$-32, %esp +; CHECK-LABEL: test3: +; CHECK: andl{{.*}}$-32, %esp call void @test2() %A = fmul <2 x double> %x, %y ret <2 x double> %A |