Mercurial > hg > CbC > CbC_llvm
diff test/Analysis/BasicAA/invariant_load.ll @ 0:95c75e76d11b LLVM3.4
LLVM 3.4
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Thu, 12 Dec 2013 13:56:28 +0900 |
parents | |
children | 60c9769439b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/Analysis/BasicAA/invariant_load.ll Thu Dec 12 13:56:28 2013 +0900 @@ -0,0 +1,26 @@ +; RUN: opt < %s -basicaa -gvn -S | FileCheck %s + +; The input *.ll is obtained by manually annotating "invariant.load" to the +; two loads. With "invariant.load" metadata, the second load is redundant. +; +; int foo(int *p, char *q) { +; *q = (char)*p; +; return *p + 1; +; } + +define i32 @foo(i32* nocapture %p, i8* nocapture %q) { +entry: + %0 = load i32* %p, align 4, !invariant.load !3 + %conv = trunc i32 %0 to i8 + store i8 %conv, i8* %q, align 1 + %1 = load i32* %p, align 4, !invariant.load !3 + %add = add nsw i32 %1, 1 + ret i32 %add + +; CHECK: foo +; CHECK: %0 = load i32* %p +; CHECK: store i8 %conv, i8* %q, +; CHECK: %add = add nsw i32 %0, 1 +} + +!3 = metadata !{}