154 lines
5.1 KiB
Plaintext
154 lines
5.1 KiB
Plaintext
|
# RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -no-stack-coloring=false -run-pass stack-coloring -o - %s
|
||
|
|
|
||
|
|
# Test to insure that the liveness analysis in the StackColoring
|
||
|
|
# pass gracefully handles statically unreachable blocks. See PR 37310.
|
||
|
|
|
||
|
|
# This MIR testcase was created by compiling the following test, first
|
||
|
|
# with "clang -emit-llvm -S" and then "llc -stop-before stack-coloring",
|
||
|
|
# and finally editing the resulting MIR by hand to introduce a statically
|
||
|
|
# unreachable BB (to wit: rename all bb.3 to bb.4, rename bb.2 to bb.3,
|
||
|
|
# then add bb.2 with unconditional jump to bb.4).
|
||
|
|
|
||
|
|
# Original C code:
|
||
|
|
# extern int inita(int *);
|
||
|
|
# void foo(int x) {
|
||
|
|
# if (x != 3) {
|
||
|
|
# int q[128];
|
||
|
|
# inita(&q[0]);
|
||
|
|
# return;
|
||
|
|
# }
|
||
|
|
# int r[128];
|
||
|
|
# inita(&r[x]);
|
||
|
|
# }
|
||
|
|
|
||
|
|
--- |
|
||
|
|
|
||
|
|
define void @foo(i32 %x) {
|
||
|
|
entry:
|
||
|
|
%q = alloca [128 x i32], align 16
|
||
|
|
%r = alloca [128 x i32], align 16
|
||
|
|
%cmp = icmp eq i32 %x, 3
|
||
|
|
br i1 %cmp, label %if.end, label %if.then
|
||
|
|
|
||
|
|
if.then: ; preds = %entry
|
||
|
|
%0 = bitcast [128 x i32]* %q to i8*
|
||
|
|
call void @llvm.lifetime.start.p0i8(i64 512, i8* nonnull %0)
|
||
|
|
%arrayidx2 = bitcast [128 x i32]* %q to i32*
|
||
|
|
%call = call i32 @inita(i32* nonnull %arrayidx2)
|
||
|
|
call void @llvm.lifetime.end.p0i8(i64 512, i8* nonnull %0)
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
unreachable:
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
if.end: ; preds = %entry
|
||
|
|
%1 = bitcast [128 x i32]* %r to i8*
|
||
|
|
call void @llvm.lifetime.start.p0i8(i64 512, i8* nonnull %1)
|
||
|
|
%arrayidx1 = getelementptr inbounds [128 x i32], [128 x i32]* %r, i64 0, i64 3
|
||
|
|
%call2 = call i32 @inita(i32* nonnull %arrayidx1)
|
||
|
|
call void @llvm.lifetime.end.p0i8(i64 512, i8* nonnull %1)
|
||
|
|
br label %return
|
||
|
|
|
||
|
|
return: ; preds = %if.end, %if.then
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
|
||
|
|
|
||
|
|
declare i32 @inita(i32*)
|
||
|
|
|
||
|
|
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
|
||
|
|
|
||
|
|
declare void @llvm.stackprotector(i8*, i8**)
|
||
|
|
|
||
|
|
...
|
||
|
|
---
|
||
|
|
name: foo
|
||
|
|
alignment: 16
|
||
|
|
exposesReturnsTwice: false
|
||
|
|
legalized: false
|
||
|
|
regBankSelected: false
|
||
|
|
selected: false
|
||
|
|
failedISel: false
|
||
|
|
tracksRegLiveness: true
|
||
|
|
registers:
|
||
|
|
- { id: 0, class: gr32, preferred-register: '' }
|
||
|
|
- { id: 1, class: gr32, preferred-register: '' }
|
||
|
|
- { id: 2, class: gr64, preferred-register: '' }
|
||
|
|
- { id: 3, class: gr32, preferred-register: '' }
|
||
|
|
- { id: 4, class: gr64, preferred-register: '' }
|
||
|
|
- { id: 5, class: gr32, preferred-register: '' }
|
||
|
|
liveins:
|
||
|
|
- { reg: '$edi' }
|
||
|
|
frameInfo:
|
||
|
|
isFrameAddressTaken: false
|
||
|
|
isReturnAddressTaken: false
|
||
|
|
hasStackMap: false
|
||
|
|
hasPatchPoint: false
|
||
|
|
stackSize: 0
|
||
|
|
offsetAdjustment: 0
|
||
|
|
maxAlignment: 16
|
||
|
|
adjustsStack: false
|
||
|
|
hasCalls: true
|
||
|
|
stackProtector: ''
|
||
|
|
maxCallFrameSize: 4294967295
|
||
|
|
hasOpaqueSPAdjustment: false
|
||
|
|
hasVAStart: false
|
||
|
|
hasMustTailInVarArgFunc: false
|
||
|
|
localFrameSize: 0
|
||
|
|
savePoint: ''
|
||
|
|
restorePoint: ''
|
||
|
|
fixedStack:
|
||
|
|
stack:
|
||
|
|
- { id: 0, name: q, type: default, offset: 0, size: 512, alignment: 16,
|
||
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
- { id: 1, name: r, type: default, offset: 0, size: 512, alignment: 16,
|
||
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
constants:
|
||
|
|
body: |
|
||
|
|
bb.0.entry:
|
||
|
|
successors: %bb.3(0x40000000), %bb.1(0x40000000)
|
||
|
|
liveins: $edi
|
||
|
|
|
||
|
|
%0:gr32 = COPY $edi
|
||
|
|
%1:gr32 = SUB32ri8 %0, 3, implicit-def $eflags
|
||
|
|
JCC_1 %bb.3, 4, implicit $eflags
|
||
|
|
JMP_1 %bb.1
|
||
|
|
|
||
|
|
bb.1.if.then:
|
||
|
|
successors: %bb.4(0x80000000)
|
||
|
|
|
||
|
|
LIFETIME_START %stack.0.q
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
|
||
|
|
%2:gr64 = LEA64r %stack.0.q, 1, $noreg, 0, $noreg
|
||
|
|
$rdi = COPY %2
|
||
|
|
CALL64pcrel32 @inita, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
|
||
|
|
%3:gr32 = COPY $eax
|
||
|
|
LIFETIME_END %stack.0.q
|
||
|
|
JMP_1 %bb.4
|
||
|
|
|
||
|
|
bb.2.unreachable:
|
||
|
|
successors: %bb.4(0x80000000)
|
||
|
|
|
||
|
|
JMP_1 %bb.4
|
||
|
|
|
||
|
|
bb.3.if.end:
|
||
|
|
successors: %bb.4(0x80000000)
|
||
|
|
|
||
|
|
LIFETIME_START %stack.1.r
|
||
|
|
%4:gr64 = LEA64r %stack.1.r, 1, $noreg, 12, $noreg
|
||
|
|
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
|
||
|
|
$rdi = COPY %4
|
||
|
|
CALL64pcrel32 @inita, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
|
||
|
|
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
|
||
|
|
%5:gr32 = COPY $eax
|
||
|
|
LIFETIME_END %stack.1.r
|
||
|
|
|
||
|
|
bb.4.return:
|
||
|
|
RET 0
|
||
|
|
|
||
|
|
...
|