forked from OSchip/llvm-project
28 lines
914 B
YAML
28 lines
914 B
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=i386-- -run-pass=instruction-select -verify-machineinstrs -global-isel %s -o - | FileCheck %s
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--- |
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define void @read_flags() { ret void }
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...
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---
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# Check that we select a the x86.flags.read.u32 intrinsic into a RDFLAGS
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# instruction. Also check that we constrain the register class of the COPY to
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# gr32.
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name: read_flags
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legalized: true
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regBankSelected: true
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registers:
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- { id: 0, class: gpr }
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body: |
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bb.0:
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; CHECK-LABEL: name: read_flags
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; CHECK: [[RDFLAGS32_:%[0-9]+]]:gr32 = RDFLAGS32 implicit-def %esp, implicit %esp
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; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gr64 = SUBREG_TO_REG 0, [[RDFLAGS32_]], %subreg.sub_32bit
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; CHECK: %rax = COPY [[SUBREG_TO_REG]]
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%0(s32) = G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.x86.flags.read.u32)
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%rax = COPY %0(s32)
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...
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