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author | Cameron Zwarich <zwarich@apple.com> | 2011-03-16 22:20:18 +0000 |
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committer | Cameron Zwarich <zwarich@apple.com> | 2011-03-16 22:20:18 +0000 |
commit | ebe8173941238cfbabadb1c63bca7fb7dcf2adbe (patch) | |
tree | e26ad4384575e2b10d06cd5476abbe4d91724ada /test | |
parent | 7be4b7ed75d0e094d2cb1998a3d4a8d346b5d839 (diff) | |
download | llvm-ebe8173941238cfbabadb1c63bca7fb7dcf2adbe.tar.gz llvm-ebe8173941238cfbabadb1c63bca7fb7dcf2adbe.tar.bz2 llvm-ebe8173941238cfbabadb1c63bca7fb7dcf2adbe.tar.xz |
The x86-64 ABI says that a bool is only guaranteed to be sign-extended to a byte
rather than an int. Thankfully, this only causes LLVM to miss optimizations, not
generate incorrect code.
This just fixes the zext at the return. We still insert an i32 ZextAssert when
reading a function's arguments, but it is followed by a truncate and another i8
ZextAssert so it is not optimized.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127766 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/CodeGen/X86/bool-zext.ll | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/test/CodeGen/X86/bool-zext.ll b/test/CodeGen/X86/bool-zext.ll index 67168d4bf0..d2c30c64f2 100644 --- a/test/CodeGen/X86/bool-zext.ll +++ b/test/CodeGen/X86/bool-zext.ll @@ -6,7 +6,7 @@ define void @bar1(i1 zeroext %v1) nounwind ssp { entry: %conv = zext i1 %v1 to i32 - %call = tail call i32 (...)* @foo(i32 %conv) nounwind + %call = tail call i32 (...)* @foo1(i32 %conv) nounwind ret void } @@ -16,8 +16,20 @@ entry: define void @bar2(i8 zeroext %v1) nounwind ssp { entry: %conv = zext i8 %v1 to i32 - %call = tail call i32 (...)* @foo(i32 %conv) nounwind + %call = tail call i32 (...)* @foo1(i32 %conv) nounwind ret void } -declare i32 @foo(...) +; CHECK: @bar3 +; CHECK: callq +; CHECK-NOT: movzbl +; CHECK-NOT: and +; CHECK: ret +define zeroext i1 @bar3() nounwind ssp { +entry: + %call = call i1 @foo2() nounwind + ret i1 %call +} + +declare i32 @foo1(...) +declare zeroext i1 @foo2() |