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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-extending-loads-s1.mir
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2026-09-02 16:34:47 -07:00

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64 -O0 -run-pass=aarch64-prelegalizer-combiner -global-isel -verify-machineinstrs %s -o - | FileCheck %s
# Check we don't try to combine a load of < s8 as that will end up creating a illegal non-extending load.
--- |
define i8 @test(ptr %ptr) {
ret i8 undef
}
...
---
name: test
alignment: 4
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
- { id: 3, class: _ }
body: |
bb.1 (%ir-block.0):
liveins: $x0
; CHECK-LABEL: name: test
; CHECK: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s1) = G_LOAD [[COPY]](p0) :: (load (s1) from %ir.ptr)
; CHECK-NEXT: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[LOAD]](s1)
; CHECK-NEXT: $w0 = COPY [[ZEXT]](s32)
; CHECK-NEXT: RET_ReallyLR implicit $w0
%0:_(p0) = COPY $x0
%1:_(s1) = G_LOAD %0(p0) :: (load (s1) from %ir.ptr)
%2:_(s8) = G_ZEXT %1(s1)
%3:_(s32) = G_ANYEXT %2(s8)
$w0 = COPY %3(s32)
RET_ReallyLR implicit $w0
...