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| author | Owen Anderson <resistor@mac.com> | 2010-09-18 04:45:14 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2010-09-18 04:45:14 +0000 |
| commit | 14ac1dd2be4f72ae1e48a1fd1c2f9bedc7f980e2 (patch) | |
| tree | 01a64e0cf949843d00bcdc8d16dfd47384a49c30 /test | |
| parent | c109556a0a7f0dca78f60967c3560fcaa27097a0 (diff) | |
| download | external_llvm-14ac1dd2be4f72ae1e48a1fd1c2f9bedc7f980e2.zip external_llvm-14ac1dd2be4f72ae1e48a1fd1c2f9bedc7f980e2.tar.gz external_llvm-14ac1dd2be4f72ae1e48a1fd1c2f9bedc7f980e2.tar.bz2 | |
Invert the logic of reachesChainWithoutSideEffects(). What we want to check is that there is
NO path to the destination containing side effects, not that SOME path contains no side effects.
In practice, this only manifests with CombinerAA enabled, because otherwise the chain has little
to no branching, so "any" is effectively equivalent to "all".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114268 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2010-09-17-SideEffectsInChain.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-09-17-SideEffectsInChain.ll b/test/CodeGen/X86/2010-09-17-SideEffectsInChain.ll new file mode 100644 index 0000000..35434ff --- /dev/null +++ b/test/CodeGen/X86/2010-09-17-SideEffectsInChain.ll @@ -0,0 +1,26 @@ +; RUN: llc < %s -combiner-alias-analysis -march=x86-64 | FileCheck %s + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-apple-darwin10.4" +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind + +define fastcc i32 @cli_magic_scandesc(i8* %in) nounwind ssp { +entry: + %a = alloca [64 x i8] + %b = getelementptr inbounds [64 x i8]* %a, i64 0, i32 0 + %c = getelementptr inbounds [64 x i8]* %a, i64 0, i32 30 + %d = load i8* %b, align 8 + %e = load i8* %c, align 8 + %f = bitcast [64 x i8]* %a to i8* + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %f, i8* %in, i64 64, i32 8, i1 false) nounwind + store i8 %d, i8* %b, align 8 + store i8 %e, i8* %c, align 8 + ret i32 0 +} + +; CHECK: movq ___stack_chk_guard@GOTPCREL(%rip), %rax +; CHECK: movb (%rsp), %dl +; CHECK-NEXT: movb 30(%rsp), %sil +; CHECK: movb %dl, (%rsp) +; CHECK-NEXT: movb %sil, 30(%rsp) +; CHECK: callq ___stack_chk_fail |