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| author | Tim Northover <tnorthover@apple.com> | 2013-08-04 09:35:57 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2013-08-04 09:35:57 +0000 |
| commit | a54b66277e5d4bdd55825eb9378f07334692020c (patch) | |
| tree | 5d9f1babbb49983272cccba01697f21af0b8a281 /test/CodeGen | |
| parent | a2b0c335d8218e08e5014ce59cb52011f4d3bd55 (diff) | |
| download | external_llvm-a54b66277e5d4bdd55825eb9378f07334692020c.zip external_llvm-a54b66277e5d4bdd55825eb9378f07334692020c.tar.gz external_llvm-a54b66277e5d4bdd55825eb9378f07334692020c.tar.bz2 | |
X86: correct tail return address calculation
Due to the weird and wondeful usual arithmetic conversions, some
calculations involving negative values were getting performed in
uint32_t and then promoted to int64_t, which is really not a good
idea.
Patch by Katsuhiro Ueno.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187703 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/tailcall-calleesave.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/X86/tailcall-calleesave.ll b/test/CodeGen/X86/tailcall-calleesave.ll new file mode 100644 index 0000000..2770d05 --- /dev/null +++ b/test/CodeGen/X86/tailcall-calleesave.ll @@ -0,0 +1,19 @@ +; RUN: llc -march=x86 -tailcallopt < %s | FileCheck %s + +target triple = "i686-apple-darwin" + +declare fastcc void @foo(i32, i32, i32, i32, i32, i32) +declare i32* @bar(i32*) + +define fastcc void @hoge(i32 %b) nounwind { +; Do not overwrite pushed callee-save registers +; CHECK: pushl +; CHECK: subl $[[SIZE:[0-9]+]], %esp +; CHECK-NOT: [[SIZE]](%esp) + %a = alloca i32 + store i32 0, i32* %a + %d = tail call i32* @bar(i32* %a) nounwind + store i32 %b, i32* %d + tail call fastcc void @foo(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6) nounwind + ret void +} |