llvm-project/llvm/test/CodeGen/X86/GlobalISel/legalize-sub.mir

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# RUN: llc -mtriple=x86_64-linux-gnu -global-isel -run-pass=legalizer %s -o - | FileCheck %s
--- |
define void @test_sub_i1() { ret void}
define i32 @test_sub_i32(i32 %arg1, i32 %arg2) {
%ret = sub i32 %arg1, %arg2
ret i32 %ret
}
...
---
name: test_sub_i1
# CHECK-LABEL: name: test_sub_i1
alignment: 4
legalized: false
regBankSelected: false
registers:
- { id: 0, class: _, preferred-register: '' }
- { id: 1, class: _, preferred-register: '' }
- { id: 2, class: _, preferred-register: '' }
# CHECK: %0(s32) = COPY %edx
# CHECK-NEXT: %3(s8) = G_TRUNC %0(s32)
# CHECK-NEXT: %4(s8) = G_TRUNC %0(s32)
# CHECK-NEXT: %5(s8) = G_SUB %3, %4
# CHECK-NEXT: %2(s1) = G_TRUNC %5(s8)
# CHECK-NEXT: RET 0
body: |
bb.1 (%ir-block.0):
%0(s32) = COPY %edx
%1(s1) = G_TRUNC %0(s32)
%2(s1) = G_SUB %1, %1
RET 0
...
---
name: test_sub_i32
# CHECK-LABEL: name: test_sub_i32
alignment: 4
legalized: false
regBankSelected: false
tracksRegLiveness: true
registers:
- { id: 0, class: _ }
- { id: 1, class: _ }
- { id: 2, class: _ }
# CHECK: %0(s32) = COPY %edi
# CHECK-NEXT: %1(s32) = COPY %esi
# CHECK-NEXT: %2(s32) = G_SUB %0, %1
# CHECK-NEXT: %eax = COPY %2(s32)
# CHECK-NEXT: RET 0, implicit %eax
body: |
bb.1 (%ir-block.0):
liveins: %edi, %esi
%0(s32) = COPY %edi
%1(s32) = COPY %esi
%2(s32) = G_SUB %0, %1
%eax = COPY %2(s32)
RET 0, implicit %eax
...