# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 2
# RUN: llc -mtriple=x86_64 -verify-machineinstrs --run-pass=machine-cse -o - %s | FileCheck %s
--- |
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
define float @max(float noundef %a, float noundef %b) #0 {
entry:
%U = fcmp uno float %a, %b
br i1 %U, label %UL, label %NU
NU: ; preds = %entry
%GT = fcmp ogt float %a, %b
br i1 %GT, label %EXIT, label %NGT
NGT: ; preds = %NU
%LT = fcmp one float %a, %b
br i1 %LT, label %EXIT, label %EQ
EQ: ; preds = %NGT
%bc = bitcast float %a to i32
%cmp = icmp slt i32 %bc, 0
%eq = select i1 %cmp, float %a, float %b
br label %EXIT
UL: ; preds = %entry
%AU = fcmp uno float %a, %a
br i1 %AU, label %EXIT, label %ULB
ULB: ; preds = %UL
br label %EXIT
EXIT: ; preds = %ULB, %UL, %EQ, %NGT, %NU
%res = phi float [ %a, %NU ], [ %b, %NGT ], [ %a, %UL ], [ %eq, %EQ ], [ %b, %ULB ]
ret float %res
}
attributes #0 = { "target-cpu"="skylake" }
...
---
name: max
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHCatchret: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: true
failsVerification: false
tracksDebugUserValues: false
registers:
- { id: 0, class: fr32, preferred-register: '' }
- { id: 1, class: fr32, preferred-register: '' }
- { id: 2, class: fr32, preferred-register: '' }
- { id: 3, class: fr32, preferred-register: '' }
- { id: 4, class: gr32, preferred-register: '' }
liveins:
- { reg: '$xmm0', virtual-reg: '%2' }
- { reg: '$xmm1', virtual-reg: '%3' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 1
adjustsStack: false
hasCalls: false
stackProtector: ''
functionContext: ''
maxCallFrameSize: 4294967295
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack: []
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
; CHECK-LABEL: name: max
; CHECK: bb.0.entry:
; CHECK-NEXT: successors: %bb.6(0x00000800), %bb.1(0x7ffff800)
; CHECK-NEXT: liveins: $xmm0, $xmm1
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:fr32 = COPY $xmm1
; CHECK-NEXT: [[COPY1:%[0-9]+]]:fr32 = COPY $xmm0
; CHECK-NEXT: nofpexcept VUCOMISSrr [[COPY1]], [[COPY]], implicit-def $eflags, implicit $mxcsr
; CHECK-NEXT: JCC_1 %bb.6, 10, implicit $eflags
; CHECK-NEXT: JMP_1 %bb.1
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1.NU:
; CHECK-NEXT: successors: %bb.8(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: JCC_1 %bb.8, 7, implicit $eflags
; CHECK-NEXT: JMP_1 %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2.NGT:
; CHECK-NEXT: successors: %bb.8(0x50000000), %bb.3(0x30000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: nofpexcept VUCOMISSrr [[COPY1]], [[COPY]], implicit-def $eflags, implicit $mxcsr
; CHECK-NEXT: JCC_1 %bb.8, 5, implicit $eflags
; CHECK-NEXT: JMP_1 %bb.3
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3.EQ:
; CHECK-NEXT: successors: %bb.4(0x40000000), %bb.5(0x40000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[VMOVSS2DIrr:%[0-9]+]]:gr32 = VMOVSS2DIrr [[COPY1]]
; CHECK-NEXT: TEST32rr [[VMOVSS2DIrr]], [[VMOVSS2DIrr]], implicit-def $eflags
; CHECK-NEXT: JCC_1 %bb.5, 8, implicit $eflags
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4.EQ:
; CHECK-NEXT: successors: %bb.5(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.5.EQ:
; CHECK-NEXT: successors: %bb.8(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[PHI:%[0-9]+]]:fr32 = PHI [[COPY]], %bb.4, [[COPY1]], %bb.3
; CHECK-NEXT: JMP_1 %bb.8
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.6.UL:
; CHECK-NEXT: successors: %bb.8(0x00000800), %bb.7(0x7ffff800)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: nofpexcept VUCOMISSrr [[COPY1]], [[COPY1]], implicit-def $eflags, implicit $mxcsr
; CHECK-NEXT: JCC_1 %bb.8, 10, implicit $eflags
; CHECK-NEXT: JMP_1 %bb.7
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.7.ULB:
; CHECK-NEXT: successors: %bb.8(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.8.EXIT:
; CHECK-NEXT: [[PHI1:%[0-9]+]]:fr32 = PHI [[COPY1]], %bb.1, [[COPY]], %bb.2, [[PHI]], %bb.5, [[COPY1]], %bb.6, [[COPY]], %bb.7
; CHECK-NEXT: $xmm0 = COPY [[PHI1]]
; CHECK-NEXT: RET 0, $xmm0
bb.0.entry:
successors: %bb.4(0x00000800), %bb.1(0x7ffff800)
liveins: $xmm0, $xmm1
%3:fr32 = COPY $xmm1
%2:fr32 = COPY $xmm0
nofpexcept VUCOMISSrr %2, %3, implicit-def $eflags, implicit $mxcsr
JCC_1 %bb.4, 10, implicit $eflags
JMP_1 %bb.1
bb.1.NU:
successors: %bb.6(0x40000000), %bb.2(0x40000000)
nofpexcept VUCOMISSrr %2, %3, implicit-def $eflags, implicit $mxcsr
JCC_1 %bb.6, 7, implicit $eflags
JMP_1 %bb.2
bb.2.NGT:
successors: %bb.6(0x50000000), %bb.3(0x30000000)
nofpexcept VUCOMISSrr %2, %3, implicit-def $eflags, implicit $mxcsr
JCC_1 %bb.6, 5, implicit $eflags
JMP_1 %bb.3
bb.3.EQ:
successors: %bb.7(0x40000000), %bb.8(0x40000000)
%4:gr32 = VMOVSS2DIrr %2
TEST32rr %4, %4, implicit-def $eflags
JCC_1 %bb.8, 8, implicit $eflags
bb.7.EQ:
successors: %bb.8(0x80000000)
bb.8.EQ:
successors: %bb.6(0x80000000)
%0:fr32 = PHI %3, %bb.7, %2, %bb.3
JMP_1 %bb.6
bb.4.UL:
successors: %bb.6(0x00000800), %bb.5(0x7ffff800)
nofpexcept VUCOMISSrr %2, %2, implicit-def $eflags, implicit $mxcsr
JCC_1 %bb.6, 10, implicit $eflags
JMP_1 %bb.5
bb.5.ULB:
successors: %bb.6(0x80000000)
bb.6.EXIT:
%1:fr32 = PHI %2, %bb.1, %3, %bb.2, %0, %bb.8, %2, %bb.4, %3, %bb.5
$xmm0 = COPY %1
RET 0, $xmm0
...
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