126016b662
This patch is the follow-up of https://github.com/llvm/llvm-project/pull/127979. It introduces a helper `simplifyNonNullOperand` to avoid duplicate logic. It also addresses the one-use issue in `visitLoadInst`, as discussed in https://github.com/llvm/llvm-project/pull/127979#issuecomment-2671013972. The `nonnull` attribute is also supported. Proof: https://alive2.llvm.org/ce/z/MCKgT9
42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes='instcombine,early-cse<memssa>' -S %s | FileCheck %s
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define i32 @load_store_sameval(ptr %p, i1 %cond1, i1 %cond2) {
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; CHECK-LABEL: define i32 @load_store_sameval(
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; CHECK-SAME: ptr [[P:%.*]], i1 [[COND1:%.*]], i1 [[COND2:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[PRE:%.*]] = load i32, ptr [[P]], align 4
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; CHECK-NEXT: br label %[[BLOCK:.*]]
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; CHECK: [[BLOCK]]:
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; CHECK-NEXT: br label %[[BLOCK2:.*]]
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; CHECK: [[BLOCK2]]:
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; CHECK-NEXT: br i1 [[COND2]], label %[[BLOCK3:.*]], label %[[EXIT:.*]]
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; CHECK: [[BLOCK3]]:
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; CHECK-NEXT: [[LOAD:%.*]] = load double, ptr [[P]], align 8
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; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[LOAD]], 0.000000e+00
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; CHECK-NEXT: br i1 [[CMP]], label %[[BLOCK]], label %[[BLOCK2]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%spec.select = select i1 %cond1, ptr null, ptr %p
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%pre = load i32, ptr %spec.select, align 4
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br label %block
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block:
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br label %block2
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block2:
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br i1 %cond2, label %block3, label %exit
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block3:
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%load = load double, ptr %spec.select, align 8
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%cmp = fcmp une double %load, 0.000000e+00
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br i1 %cmp, label %block, label %block2
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exit:
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store i32 %pre, ptr %spec.select, align 4
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ret i32 0
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}
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