18c8ed5416
One of the cases identified in PR45116 - we don't need to limit store narrowing to ABI alignment, we can use allowsMemoryAccess - which tests using getABITypeAlign, but also checks if a target permits (fast) misaligned memory access by checking allowsMisalignedMemoryAccesses as a fallback.
25 lines
652 B
LLVM
25 lines
652 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=knl | FileCheck %s
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define void @foo(i64* %ptr) {
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; CHECK-LABEL: foo:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: orb $16, (%rdi)
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; CHECK-NEXT: retq
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%r11 = load i64, i64* %ptr, align 8
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%r12 = or i64 16, %r11
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store i64 %r12, i64* %ptr, align 8
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ret void
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}
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define void @foo_noalign(i64* %ptr) {
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; CHECK-LABEL: foo_noalign:
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; CHECK: ## %bb.0:
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; CHECK-NEXT: orb $16, (%rdi)
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; CHECK-NEXT: retq
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%r11 = load i64, i64* %ptr, align 1
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%r12 = or i64 16, %r11
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store i64 %r12, i64* %ptr, align 1
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ret void
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}
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