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Diffstat (limited to 'test/CodeGen/X86/peep-test-2.ll')
-rw-r--r-- | test/CodeGen/X86/peep-test-2.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/X86/peep-test-2.ll b/test/CodeGen/X86/peep-test-2.ll new file mode 100644 index 0000000..788f610 --- /dev/null +++ b/test/CodeGen/X86/peep-test-2.ll @@ -0,0 +1,17 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep testl + +; It's tempting to eliminate the testl instruction here and just use the +; EFLAGS value from the incl, however it can't be known whether the add +; will overflow, and if it does the incl would set OF, and the +; subsequent setg would return true. + +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-f80:128:128" +target triple = "i386-apple-darwin9.6" + +define i32 @f(i32 %j) nounwind readnone { +entry: + %0 = add i32 %j, 1 ; <i32> [#uses=1] + %1 = icmp sgt i32 %0, 0 ; <i1> [#uses=1] + %2 = zext i1 %1 to i32 ; <i32> [#uses=1] + ret i32 %2 +} |