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llvm-project/llvm/test/CodeGen/X86/scavenger.mir

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RegisterScavenging: Add ScavengerTest pass This pass allows to run the register scavenging independently of PrologEpilogInserter to allow targeted testing. Also adds some basic register scavenging tests. llvm-svn: 304606
2017-06-03 07:01:42 +08:00
# RUN: llc -mtriple=i386-- -run-pass scavenger-test -verify-machineinstrs -o - %s | FileCheck %s
---
# CHECK-LABEL: name: func0
name: func0
tracksRegLiveness: true
body: |
bb.0:
RegScavenging: Add scavengeRegisterBackwards() Re-apply r276044/r279124/r305516. Fixed a problem where we would refuse to place spills as the very first instruciton of a basic block and thus artifically increase pressure (test in test/CodeGen/PowerPC/scavenging.mir:spill_at_begin) This is a variant of scavengeRegister() that works for enterBasicBlockEnd()/backward(). The benefit of the backward mode is that it is not affected by incomplete kill flags. This patch also changes PrologEpilogInserter::doScavengeFrameVirtualRegs() to use the register scavenger in backwards mode. Differential Revision: http://reviews.llvm.org/D21885 llvm-svn: 305625
2017-06-17 10:08:18 +08:00
; CHECK: [[REG0:%e[a-z]+]] = MOV32ri 42
; CHECK: %ebp = COPY killed [[REG0]]
RegisterScavenging: Add ScavengerTest pass This pass allows to run the register scavenging independently of PrologEpilogInserter to allow targeted testing. Also adds some basic register scavenging tests. llvm-svn: 304606
2017-06-03 07:01:42 +08:00
%0 : gr32 = MOV32ri 42
%ebp = COPY %0
...
---
# CHECK-LABEL: name: func2
name: func2
tracksRegLiveness: true
body: |
bb.0:
; CHECK-NOT: %eax = MOV32ri 42
; CHECK: [[REG0:%e[a-z]+]] = MOV32ri 42
RegScavenging: Add scavengeRegisterBackwards() Re-apply r276044/r279124/r305516. Fixed a problem where we would refuse to place spills as the very first instruciton of a basic block and thus artifically increase pressure (test in test/CodeGen/PowerPC/scavenging.mir:spill_at_begin) This is a variant of scavengeRegister() that works for enterBasicBlockEnd()/backward(). The benefit of the backward mode is that it is not affected by incomplete kill flags. This patch also changes PrologEpilogInserter::doScavengeFrameVirtualRegs() to use the register scavenger in backwards mode. Differential Revision: http://reviews.llvm.org/D21885 llvm-svn: 305625
2017-06-17 10:08:18 +08:00
; CHECK: %ebp = COPY killed [[REG0]]
RegisterScavenging: Add ScavengerTest pass This pass allows to run the register scavenging independently of PrologEpilogInserter to allow targeted testing. Also adds some basic register scavenging tests. llvm-svn: 304606
2017-06-03 07:01:42 +08:00
%eax = MOV32ri 13
%0 : gr32 = MOV32ri 42
%ebp = COPY %0
; CHECK: [[REG1:%e[a-z]+]] = MOV32ri 23
; CHECK: [[REG2:%e[a-z]+]] = MOV32ri 7
; CHECK: [[REG1]] = ADD32ri8 [[REG1]], 5, implicit-def dead %eflags
%1 : gr32 = MOV32ri 23
%2 : gr32 = MOV32ri 7
%1 = ADD32ri8 %1, 5, implicit-def dead %eflags
NOOP implicit %ebp
RegScavenging: Add scavengeRegisterBackwards() Re-apply r276044/r279124/r305516. Fixed a problem where we would refuse to place spills as the very first instruciton of a basic block and thus artifically increase pressure (test in test/CodeGen/PowerPC/scavenging.mir:spill_at_begin) This is a variant of scavengeRegister() that works for enterBasicBlockEnd()/backward(). The benefit of the backward mode is that it is not affected by incomplete kill flags. This patch also changes PrologEpilogInserter::doScavengeFrameVirtualRegs() to use the register scavenger in backwards mode. Differential Revision: http://reviews.llvm.org/D21885 llvm-svn: 305625
2017-06-17 10:08:18 +08:00
; CHECK: NOOP implicit killed [[REG2]]
; CHECK: NOOP implicit killed [[REG1]]
RegisterScavenging: Add ScavengerTest pass This pass allows to run the register scavenging independently of PrologEpilogInserter to allow targeted testing. Also adds some basic register scavenging tests. llvm-svn: 304606
2017-06-03 07:01:42 +08:00
NOOP implicit %2
NOOP implicit %1
RETQ %eax
...
---
RegScavenging: Add scavengeRegisterBackwards() Re-apply r276044/r279124/r305516. Fixed a problem where we would refuse to place spills as the very first instruciton of a basic block and thus artifically increase pressure (test in test/CodeGen/PowerPC/scavenging.mir:spill_at_begin) This is a variant of scavengeRegister() that works for enterBasicBlockEnd()/backward(). The benefit of the backward mode is that it is not affected by incomplete kill flags. This patch also changes PrologEpilogInserter::doScavengeFrameVirtualRegs() to use the register scavenger in backwards mode. Differential Revision: http://reviews.llvm.org/D21885 llvm-svn: 305625
2017-06-17 10:08:18 +08:00
# CHECK-LABEL: name: func3
name: func3
tracksRegLiveness: true
body: |
bb.0:
; CHECK dead {{%e[a-z]+}} = MOV32ri 42
dead %0 : gr32 = MOV32ri 42
RegisterScavenging: Add ScavengerTest pass This pass allows to run the register scavenging independently of PrologEpilogInserter to allow targeted testing. Also adds some basic register scavenging tests. llvm-svn: 304606
2017-06-03 07:01:42 +08:00
...