diff options
Diffstat (limited to 'test/CodeGen/X86/dagcombine-and-setcc.ll')
-rw-r--r-- | test/CodeGen/X86/dagcombine-and-setcc.ll | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test/CodeGen/X86/dagcombine-and-setcc.ll b/test/CodeGen/X86/dagcombine-and-setcc.ll new file mode 100644 index 0000000..e7336a9 --- /dev/null +++ b/test/CodeGen/X86/dagcombine-and-setcc.ll @@ -0,0 +1,47 @@ +; RUN: llc < %s | FileCheck %s + +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.10.0" + +; Function Attrs: nounwind +declare i32 @printf(i8* nocapture readonly, ...) + +; On X86 1 is true and 0 is false, so we can't perform the combine: +; (and (setgt X, true), (setgt Y, true)) -> (setgt (or X, Y), true) +; This combine only works if the true value is -1. + + +;CHECK: cmpl +;CHECK: setg +;CHECK: cmpl +;CHECK: setg +;CHECK: andb + +@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 +; Function Attrs: optsize ssp uwtable +define i32 @foo(i32 %a, i32 %b, i32 * %c) { +if.else429: + %cmp.i1144 = icmp eq i32* %c, null + %cmp430 = icmp slt i32 %a, 2 + %cmp432 = icmp slt i32 %b, 2 + %or.cond710 = or i1 %cmp430, %cmp432 + %or.cond710.not = xor i1 %or.cond710, true + %brmerge1448 = or i1 %cmp.i1144, %or.cond710.not + br i1 %brmerge1448, label %ret1, label %ret2 + +ret1: + ret i32 0 + +ret2: + ret i32 1 +} + +define i32 @main(i32 %argc, i8** nocapture readnone %argv) { + %res = alloca i32, align 4 + %t = call i32 @foo(i32 1, i32 2, i32* %res) #3 + %v = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %t) + ret i32 0 +} + + + |