derek.holloway
7502bf64a4
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65 lines
2.7 KiB
LLVM
65 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=mergeicmps < %s | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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%"struct.a::c" = type { i32, ptr, ptr }
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; The entry block cannot be merged as the comparison is not continuous.
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; While it compares the highest address, it should not be moved after the
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; other comparisons, as that would make the allocas non-dominating.
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define i1 @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: "land.lhs.true+entry":
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; CHECK-NEXT: [[H:%.*]] = alloca %"struct.a::c", align 8
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; CHECK-NEXT: [[I:%.*]] = alloca %"struct.a::c", align 8
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; CHECK-NEXT: call void @init(ptr [[H]])
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; CHECK-NEXT: call void @init(ptr [[I]])
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds %"struct.a::c", ptr [[H]], i64 0, i32 1
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds %"struct.a::c", ptr [[I]], i64 0, i32 1
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; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(ptr [[TMP0]], ptr [[TMP1]], i64 16)
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; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; CHECK-NEXT: br i1 [[TMP2]], label [[LAND_RHS1:%.*]], label [[LAND_END:%.*]]
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; CHECK: land.rhs1:
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[H]], align 8
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; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[I]], align 8
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[TMP3]], [[TMP4]]
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; CHECK-NEXT: br label [[LAND_END]]
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; CHECK: land.end:
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; CHECK-NEXT: [[V9:%.*]] = phi i1 [ false, %"land.lhs.true+entry" ], [ [[TMP5]], [[LAND_RHS1]] ]
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; CHECK-NEXT: ret i1 [[V9]]
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;
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entry:
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%h = alloca %"struct.a::c", align 8
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%i = alloca %"struct.a::c", align 8
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call void @init(ptr %h)
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call void @init(ptr %i)
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%e = getelementptr inbounds %"struct.a::c", ptr %h, i64 0, i32 2
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%v3 = load ptr, ptr %e, align 8
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%e2 = getelementptr inbounds %"struct.a::c", ptr %i, i64 0, i32 2
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%v4 = load ptr, ptr %e2, align 8
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%cmp = icmp eq ptr %v3, %v4
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br i1 %cmp, label %land.lhs.true, label %land.end
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land.lhs.true: ; preds = %entry
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%d = getelementptr inbounds %"struct.a::c", ptr %h, i64 0, i32 1
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%v5 = load ptr, ptr %d, align 8
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%d3 = getelementptr inbounds %"struct.a::c", ptr %i, i64 0, i32 1
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%v6 = load ptr, ptr %d3, align 8
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%cmp4 = icmp eq ptr %v5, %v6
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br i1 %cmp4, label %land.rhs, label %land.end
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land.rhs: ; preds = %land.lhs.true
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%v7 = load i32, ptr %h, align 8
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%v8 = load i32, ptr %i, align 8
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%cmp6 = icmp eq i32 %v7, %v8
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br label %land.end
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land.end: ; preds = %land.rhs, %land.lhs.true, %entry
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%v9 = phi i1 [ false, %land.lhs.true ], [ false, %entry ], [ %cmp6, %land.rhs ]
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ret i1 %v9
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}
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declare void @init(ptr)
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