65 lines
2.9 KiB
LLVM
65 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -S -mergeicmps -verify-dom-info | FileCheck %s
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target triple = "x86_64"
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%Triple = type { i32, i32, i32, i32 }
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@g = external global i32
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; bb1 references a gep introduced in bb0. The gep must remain available after
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; the merge.
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define i1 @bug(%Triple* nonnull dereferenceable(16) %lhs, %Triple* nonnull dereferenceable(16) %rhs) {
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; CHECK-LABEL: @bug(
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; CHECK-NEXT: bb0:
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; CHECK-NEXT: store i32 1, i32* @g, align 4
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr [[TRIPLE:%.*]], %Triple* [[RHS:%.*]], i64 0, i32 0
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; CHECK-NEXT: [[L0_ADDR:%.*]] = getelementptr inbounds [[TRIPLE]], %Triple* [[LHS:%.*]], i64 0, i32 0
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; CHECK-NEXT: [[L0:%.*]] = load i32, i32* [[L0_ADDR]], align 4
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; CHECK-NEXT: [[R0_ADDR:%.*]] = getelementptr inbounds [[TRIPLE]], %Triple* [[RHS]], i64 0, i32 0
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; CHECK-NEXT: [[R0:%.*]] = load i32, i32* [[R0_ADDR]], align 4
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; CHECK-NEXT: [[CMP0:%.*]] = icmp eq i32 [[L0]], [[R0]]
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; CHECK-NEXT: br i1 [[CMP0]], label %"bb1+bb2", label [[FINAL:%.*]]
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; CHECK: "bb1+bb2":
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; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[TRIPLE]], %Triple* [[LHS]], i64 0, i32 2
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32, i32* [[GEP]], i64 2
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; CHECK-NEXT: [[CSTR:%.*]] = bitcast i32* [[TMP0]] to i8*
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; CHECK-NEXT: [[CSTR1:%.*]] = bitcast i32* [[TMP1]] to i8*
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; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 8)
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; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
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; CHECK-NEXT: br label [[FINAL]]
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; CHECK: final:
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; CHECK-NEXT: [[RET:%.*]] = phi i1 [ false, [[BB0:%.*]] ], [ [[TMP2]], %"bb1+bb2" ]
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; CHECK-NEXT: ret i1 [[RET]]
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;
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bb0:
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store i32 1, i32* @g
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%gep = getelementptr %Triple, %Triple* %rhs, i64 0, i32 0
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%l0_addr = getelementptr inbounds %Triple, %Triple* %lhs, i64 0, i32 0
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%l0 = load i32, i32* %l0_addr, align 4
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%r0_addr = getelementptr inbounds %Triple, %Triple* %rhs, i64 0, i32 0
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%r0 = load i32, i32* %r0_addr, align 4
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%cmp0 = icmp eq i32 %l0, %r0
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br i1 %cmp0, label %bb1, label %final
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bb1: ; preds = %bb0
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%l1_addr = getelementptr inbounds %Triple, %Triple* %lhs, i64 0, i32 2
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%l1 = load i32, i32* %l1_addr, align 4
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%r1_addr = getelementptr inbounds i32, i32* %gep, i64 2
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%r1 = load i32, i32* %r1_addr, align 4
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%cmp1 = icmp eq i32 %l1, %r1
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br i1 %cmp1, label %bb2, label %final
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bb2: ; preds = %bb1
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%l2_addr = getelementptr inbounds %Triple, %Triple* %lhs, i64 0, i32 3
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%l2 = load i32, i32* %l2_addr, align 4
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%r2_addr = getelementptr inbounds i32, i32* %gep, i64 3
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%r2 = load i32, i32* %r2_addr, align 4
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%cmp2 = icmp eq i32 %l2, %r2
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br label %final
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final: ; preds = %bb2, %bb1, %bb0
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%ret = phi i1 [ false, %bb0 ], [ false, %bb1 ], [ %cmp2, %bb2 ]
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ret i1 %ret
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}
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