96 lines
2.4 KiB
Plaintext
96 lines
2.4 KiB
Plaintext
|
# RUN: llc -mtriple amdgcn -run-pass livevars -run-pass phi-node-elimination -o - %s | FileCheck %s
|
||
|
|
|
||
|
|
################################################################################
|
||
|
|
# This test used to hit an assert in PHIElimination:
|
||
|
|
# PHIElimination::LowerPHINode(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator): Assertion `KillInst->readsRegister(SrcReg) && "Cannot find kill instruction"'
|
||
|
|
|
||
|
|
---
|
||
|
|
name: foo
|
||
|
|
tracksRegLiveness: true
|
||
|
|
body: |
|
||
|
|
bb.0:
|
||
|
|
S_CBRANCH_SCC0 %bb.2, implicit undef $scc
|
||
|
|
|
||
|
|
bb.1:
|
||
|
|
%1:sreg_32_xm0 = S_MOV_B32 255
|
||
|
|
S_BRANCH %bb.3
|
||
|
|
|
||
|
|
bb.2:
|
||
|
|
%2:sreg_32_xm0 = S_MOV_B32 254
|
||
|
|
|
||
|
|
bb.3:
|
||
|
|
dead %3:sreg_32_xm0 = PHI undef %2, %bb.2, undef %1, %bb.1
|
||
|
|
%4:sreg_32_xm0 = PHI %2, %bb.2, %1, %bb.1
|
||
|
|
S_NOP 0, implicit %4
|
||
|
|
...
|
||
|
|
|
||
|
|
# CHECK-LABEL: name: foo
|
||
|
|
# CHECK: bb.3:
|
||
|
|
# CHECK-NEXT: dead %2:sreg_32_xm0 = IMPLICIT_DEF
|
||
|
|
# CHECK-NEXT: %3:sreg_32_xm0 = COPY killed %4
|
||
|
|
# CHECK-NEXT: S_NOP 0, implicit killed %3
|
||
|
|
|
||
|
|
|
||
|
|
################################################################################
|
||
|
|
# Similar test as above, but with swapped order for the PHI nodes.
|
||
|
|
# With this PHI node order we did not hit the assert, but we used to get
|
||
|
|
#
|
||
|
|
# bb.3:
|
||
|
|
# dead %3:sreg_32_xm0 = COPY killed %4
|
||
|
|
# %2:sreg_32_xm0 = COPY %4
|
||
|
|
# S_NOP 0, implicit killed %2
|
||
|
|
#
|
||
|
|
# which looks weird regarding killed flags for %4.
|
||
|
|
|
||
|
|
---
|
||
|
|
name: bar
|
||
|
|
tracksRegLiveness: true
|
||
|
|
body: |
|
||
|
|
bb.0:
|
||
|
|
S_CBRANCH_SCC0 %bb.2, implicit undef $scc
|
||
|
|
|
||
|
|
bb.1:
|
||
|
|
%1:sreg_32_xm0 = S_MOV_B32 255
|
||
|
|
S_BRANCH %bb.3
|
||
|
|
|
||
|
|
bb.2:
|
||
|
|
%2:sreg_32_xm0 = S_MOV_B32 254
|
||
|
|
|
||
|
|
bb.3:
|
||
|
|
%4:sreg_32_xm0 = PHI %2, %bb.2, %1, %bb.1
|
||
|
|
dead %3:sreg_32_xm0 = PHI undef %2, %bb.2, undef %1, %bb.1
|
||
|
|
S_NOP 0, implicit %4
|
||
|
|
...
|
||
|
|
|
||
|
|
# CHECK-LABEL: name: bar
|
||
|
|
# CHECK: bb.3:
|
||
|
|
# CHECK-NEXT: dead %3:sreg_32_xm0 = IMPLICIT_DEF
|
||
|
|
# CHECK-NEXT: %2:sreg_32_xm0 = COPY killed %4
|
||
|
|
# CHECK-NEXT: S_NOP 0, implicit killed %2
|
||
|
|
|
||
|
|
|
||
|
|
# The following test crashes in phi-elimination hooks.
|
||
|
|
#
|
||
|
|
|
||
|
|
---
|
||
|
|
name: bax
|
||
|
|
tracksRegLiveness: true
|
||
|
|
body: |
|
||
|
|
bb.0:
|
||
|
|
S_CBRANCH_SCC0 %bb.2, implicit undef $scc
|
||
|
|
|
||
|
|
bb.1:
|
||
|
|
%1:sreg_32_xm0 = S_MOV_B32 255
|
||
|
|
S_BRANCH %bb.3
|
||
|
|
|
||
|
|
bb.2:
|
||
|
|
%2:sreg_32_xm0 = S_MOV_B32 254
|
||
|
|
|
||
|
|
bb.3:
|
||
|
|
%3:sreg_32_xm0 = PHI %2, %bb.2, %1, %bb.1
|
||
|
|
...
|
||
|
|
|
||
|
|
# CHECK-LABEL: name: bax
|
||
|
|
# CHECK: bb.3:
|
||
|
|
# CHECK-NEXT: %2:sreg_32_xm0 = COPY killed %3
|