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Revert r323559 due to EXPENSIVE_CHECKS regression. 

I have a fix for the issue (https://reviews.llvm.org/D42655) but
it's taking a while to get reviewed, so reverting in the meantime.

llvm-svn: 323841
This commit is contained in:
Eli Friedman 2018-01-31 00:40:42 +00:00
parent f98baa7065
commit 804d7ab811
2 changed files with 2 additions and 49 deletions
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4
llvm/lib/CodeGen/LivePhysRegs.cpp
View File

@ -225,10 +225,10 @@ void LivePhysRegs::addLiveOutsNoPristines(const MachineBasicBlock &MBB) {
void LivePhysRegs::addLiveOuts(const MachineBasicBlock &MBB) { void LivePhysRegs::addLiveOuts(const MachineBasicBlock &MBB) {
const MachineFunction &MF = *MBB.getParent(); const MachineFunction &MF = *MBB.getParent();
if (!MBB.isReturnBlock()) { if (!MBB.succ_empty()) {
addPristines(MF); addPristines(MF);
addLiveOutsNoPristines(MBB); addLiveOutsNoPristines(MBB);
} else { } else if (MBB.isReturnBlock()) {
// For the return block: Add all callee saved registers. // For the return block: Add all callee saved registers.
const MachineFrameInfo &MFI = MF.getFrameInfo(); const MachineFrameInfo &MFI = MF.getFrameInfo();
if (MFI.isCalleeSavedInfoValid()) if (MFI.isCalleeSavedInfoValid())

47
llvm/test/CodeGen/Thumb/stm-scavenging.ll
View File

@ -1,47 +0,0 @@
; RUN: llc < %s | FileCheck %s
target triple = "thumbv6---gnueabi"
; Use STM to save the three registers
; CHECK-LABEL: use_stm:
; CHECK: .save {r7, lr}
; CHECK: .setfp r7, sp
; CHECK: stm r3!, {r0, r1, r2}
; CHECK: bl throws_1
define void @use_stm(i32 %a, i32 %b, i32 %c, i32* %d) local_unnamed_addr noreturn "no-frame-pointer-elim"="true" {
entry:
%arrayidx = getelementptr inbounds i32, i32* %d, i32 2
store i32 %a, i32* %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, i32* %d, i32 3
store i32 %b, i32* %arrayidx1, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %d, i32 4
store i32 %c, i32* %arrayidx2, align 4
tail call void @throws_1(i32 %a, i32 %b, i32 %c) noreturn
unreachable
}
; Don't use STM: there is no available register to store
; the address. We could transform this with some extra math, but
; that currently isn't implemented.
; CHECK-LABEL: no_stm:
; CHECK: .save {r7, lr}
; CHECK: .setfp r7, sp
; CHECK: str r0,
; CHECK: str r1,
; CHECK: str r2,
; CHECK: bl throws_2
define void @no_stm(i32 %a, i32 %b, i32 %c, i32* %d) local_unnamed_addr noreturn "no-frame-pointer-elim"="true" {
entry:
%arrayidx = getelementptr inbounds i32, i32* %d, i32 2
store i32 %a, i32* %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, i32* %d, i32 3
store i32 %b, i32* %arrayidx1, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %d, i32 4
store i32 %c, i32* %arrayidx2, align 4
tail call void @throws_2(i32 %a, i32 %b, i32 %c, i32* %d) noreturn
unreachable
}
declare void @throws_1(i32, i32, i32) noreturn
declare void @throws_2(i32, i32, i32, i32*) noreturn