diff options
Diffstat (limited to 'llvm/test/Transforms/ExpandMemCmp/X86/pr36421.ll')
| -rw-r--r-- | llvm/test/Transforms/ExpandMemCmp/X86/pr36421.ll | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/llvm/test/Transforms/ExpandMemCmp/X86/pr36421.ll b/llvm/test/Transforms/ExpandMemCmp/X86/pr36421.ll new file mode 100644 index 00000000000..c64d37a3757 --- /dev/null +++ b/llvm/test/Transforms/ExpandMemCmp/X86/pr36421.ll @@ -0,0 +1,79 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt < %s -domtree -expandmemcmp -verify-dom-info -S | FileCheck %s + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-unknown-unknown" + +@.str = private unnamed_addr constant [7 x i8] c"abcdef\00", align 1 +@.str.1 = private unnamed_addr constant [7 x i8] c"ABCDEF\00", align 1 + +define i32 @test(i8* nocapture readonly %string, i32 %len) local_unnamed_addr #0 { +; CHECK-LABEL: @test( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[LEN:%.*]], 6 +; CHECK-NEXT: br i1 [[COND]], label [[SW_BB:%.*]], label [[RETURN:%.*]] +; CHECK: sw.bb: +; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[STRING:%.*]] to i32* +; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[TMP0]] +; CHECK-NEXT: [[TMP2:%.*]] = xor i32 [[TMP1]], 1684234849 +; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i8, i8* [[STRING]], i8 4 +; CHECK-NEXT: [[TMP4:%.*]] = bitcast i8* [[TMP3]] to i16* +; CHECK-NEXT: [[TMP5:%.*]] = load i16, i16* [[TMP4]] +; CHECK-NEXT: [[TMP6:%.*]] = zext i16 [[TMP5]] to i32 +; CHECK-NEXT: [[TMP7:%.*]] = xor i32 [[TMP6]], 26213 +; CHECK-NEXT: [[TMP8:%.*]] = or i32 [[TMP2]], [[TMP7]] +; CHECK-NEXT: [[TMP9:%.*]] = icmp ne i32 [[TMP8]], 0 +; CHECK-NEXT: [[TMP10:%.*]] = zext i1 [[TMP9]] to i32 +; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP10]], 0 +; CHECK-NEXT: br i1 [[CMP]], label [[RETURN]], label [[IF_END:%.*]] +; CHECK: if.end: +; CHECK-NEXT: [[TMP11:%.*]] = bitcast i8* [[STRING]] to i32* +; CHECK-NEXT: [[TMP12:%.*]] = load i32, i32* [[TMP11]] +; CHECK-NEXT: [[TMP13:%.*]] = xor i32 [[TMP12]], 1145258561 +; CHECK-NEXT: [[TMP14:%.*]] = getelementptr i8, i8* [[STRING]], i8 4 +; CHECK-NEXT: [[TMP15:%.*]] = bitcast i8* [[TMP14]] to i16* +; CHECK-NEXT: [[TMP16:%.*]] = load i16, i16* [[TMP15]] +; CHECK-NEXT: [[TMP17:%.*]] = zext i16 [[TMP16]] to i32 +; CHECK-NEXT: [[TMP18:%.*]] = xor i32 [[TMP17]], 17989 +; CHECK-NEXT: [[TMP19:%.*]] = or i32 [[TMP13]], [[TMP18]] +; CHECK-NEXT: [[TMP20:%.*]] = icmp ne i32 [[TMP19]], 0 +; CHECK-NEXT: [[TMP21:%.*]] = zext i1 [[TMP20]] to i32 +; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[TMP21]], 0 +; CHECK-NEXT: [[DOT:%.*]] = select i1 [[CMP2]], i32 64, i32 0 +; CHECK-NEXT: br label [[RETURN]] +; CHECK: return: +; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ 61, [[SW_BB]] ], [ [[DOT]], [[IF_END]] ], [ 0, [[ENTRY:%.*]] ] +; CHECK-NEXT: ret i32 [[RETVAL_0]] +; +entry: + %cond = icmp eq i32 %len, 6 + br i1 %cond, label %sw.bb, label %return + +sw.bb: ; preds = %entry + %call = tail call i32 @memcmp(i8* %string, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i64 6) + %cmp = icmp eq i32 %call, 0 + br i1 %cmp, label %return, label %if.end + +if.end: ; preds = %sw.bb + %call1 = tail call i32 @memcmp(i8* %string, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i64 6) + %cmp2 = icmp eq i32 %call1, 0 + %. = select i1 %cmp2, i32 64, i32 0 + br label %return + +return: ; preds = %entry, %if.end8, %if.end4, %if.end, %sw.bb + %retval.0 = phi i32 [ 61, %sw.bb ], [ %., %if.end ], [ 0, %entry ] + ret i32 %retval.0 +} + +; Function Attrs: nounwind readonly +declare i32 @memcmp(i8* nocapture, i8* nocapture, i64) local_unnamed_addr #1 + +attributes #0 = { nounwind readonly ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { nounwind readonly "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } + +!llvm.module.flags = !{!0, !1} +!llvm.ident = !{!2} + +!0 = !{i32 1, !"wchar_size", i32 4} +!1 = !{i32 7, !"PIC Level", i32 2} +!2 = !{!"clang version 7.0.0 (trunk 325350)"} |
