29 lines
817 B
Plaintext
29 lines
817 B
Plaintext
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# 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 %s -o - | FileCheck %s
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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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--- |
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define void @read_flags() { ret void }
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; CHECK-LABEL: name: read_flags
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; CHECK: bb.0:
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; CHECK: [[RDFLAGS32_:%[0-9]+]]:gr32 = RDFLAGS32 implicit-def $esp, implicit $esp
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; CHECK: $eax = COPY [[RDFLAGS32_]]
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...
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---
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name: read_flags
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legalized: true
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regBankSelected: true
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registers:
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- { id: 0, class: gpr }
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body: |
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bb.0:
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%0(s32) = G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.x86.flags.read.u32)
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$eax = COPY %0(s32)
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...
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