mirror of
https://github.com/c64scene-ar/llvm-6502.git
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81ed09a1d1
Summary: Different range metadata can lead to different optimizations in later passes, possibly breaking the semantics of the merged function. So range metadata must be taken into consideration when comparing Load instructions. Thanks! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211391 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; RUN: opt -mergefunc -S < %s | FileCheck %s
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define i1 @cmp_with_range(i8*, i8*) {
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%v1 = load i8* %0, !range !0
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%v2 = load i8* %1, !range !0
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%out = icmp eq i8 %v1, %v2
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ret i1 %out
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}
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define i1 @cmp_no_range(i8*, i8*) {
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; CHECK-LABEL: @cmp_no_range
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; CHECK-NEXT %v1 = load i8* %0
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; CHECK-NEXT %v2 = load i8* %1
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; CHECK-NEXT %out = icmp eq i8 %v1, %v2
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; CHECK-NEXT ret i1 %out
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%v1 = load i8* %0
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%v2 = load i8* %1
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%out = icmp eq i8 %v1, %v2
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ret i1 %out
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}
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define i1 @cmp_different_range(i8*, i8*) {
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; CHECK-LABEL: @cmp_different_range
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; CHECK-NEXT: %v1 = load i8* %0, !range !1
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; CHECK-NEXT: %v2 = load i8* %1, !range !1
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; CHECK-NEXT: %out = icmp eq i8 %v1, %v2
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; CHECK-NEXT: ret i1 %out
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%v1 = load i8* %0, !range !1
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%v2 = load i8* %1, !range !1
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%out = icmp eq i8 %v1, %v2
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ret i1 %out
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}
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define i1 @cmp_with_same_range(i8*, i8*) {
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; CHECK-LABEL: @cmp_with_same_range
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; CHECK: tail call i1 @cmp_with_range
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%v1 = load i8* %0, !range !0
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%v2 = load i8* %1, !range !0
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%out = icmp eq i8 %v1, %v2
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ret i1 %out
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}
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!0 = metadata !{i8 0, i8 2}
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!1 = metadata !{i8 5, i8 7}
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