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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-04-16 23:25:34 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-04-16 23:25:34 +0000 |
| commit | e545d38a2871dd4fc93802d9405373325baf1e21 (patch) | |
| tree | 3ea9dc9de45f27e7c277268e7f7f19af392914f4 /test/CodeGen/X86/fold-zext-trunc.ll | |
| parent | 86f72a8002ef6049d17ae8b9a536dee18b101fd0 (diff) | |
| download | external_llvm-e545d38a2871dd4fc93802d9405373325baf1e21.zip external_llvm-e545d38a2871dd4fc93802d9405373325baf1e21.tar.gz external_llvm-e545d38a2871dd4fc93802d9405373325baf1e21.tar.bz2 | |
PR9055: extend the fix to PR4050 (r70179) to apply to zext and anyext.
Returning a new node makes the code try to replace the old node, which
in the included testcase is killed by CSE.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129650 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/fold-zext-trunc.ll')
| -rw-r--r-- | test/CodeGen/X86/fold-zext-trunc.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fold-zext-trunc.ll b/test/CodeGen/X86/fold-zext-trunc.ll new file mode 100644 index 0000000..f901ad2 --- /dev/null +++ b/test/CodeGen/X86/fold-zext-trunc.ll @@ -0,0 +1,23 @@ +; RUN: llc < %s | FileCheck %s +; PR9055 +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-f80:32:32-n8:16:32" +target triple = "i686-pc-linux-gnu" + +%struct.S0 = type { i32, [2 x i8], [2 x i8], [4 x i8] } + +@g_98 = common global %struct.S0 zeroinitializer, align 4 + +define void @foo() nounwind { +; CHECK: movzbl +; CHECK-NOT: movzbl +; CHECK: calll +entry: + %tmp17 = load i8* getelementptr inbounds (%struct.S0* @g_98, i32 0, i32 1, i32 0), align 4 + %tmp54 = zext i8 %tmp17 to i32 + %foo = load i32* bitcast (i8* getelementptr inbounds (%struct.S0* @g_98, i32 0, i32 1, i32 0) to i32*), align 4 + %conv.i = trunc i32 %foo to i8 + tail call void @func_12(i32 %tmp54, i8 zeroext %conv.i) nounwind + ret void +} + +declare void @func_12(i32, i8 zeroext) |