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