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|
# RUN: llc --run-pass=register-coalescer -o - %s | FileCheck %s
# pr45489
# Coalescing variables across a setjmp call can add a undefined
# variable value when longjmp if such variables are spilled and
# altered between the setjmp and longjmp.
# This file tests a very particular case for
# no coalescing stack pointers across the
# setjmp call.
# CHECK: %[[R1:[0-9]+]]:gpr = ADDri %stack.0.P0, 0, 14
# Stack pointer
# CHECK: %[[R2:[0-9]+]]:gpr = nuw ADDri %[[R1]], 8, 14
# CHECK: @setjmp
# Not changed between setjmp and bar(longjmp)
# CHECK-NOT: %{{[0-9]+}}:dpr, %[[R2]]:gpr = VLD1d32wb_fixed %[[R2]], 0,
# CHECK: BL @_Z3barPx3S37{{.*}}
# CHECK: %[[R3:[0-9]+]]:gpr = COPY %[[R2]]
# Used after bar
# CHECK-NOT: VLD1d32wb_fixed %[[R2]]
# CHECK: VLD1d32wb_fixed %[[R3]]
--- |
target triple = "armv8-arm-none-eabi"
%"class.std::__1::ios_base::Init" = type { i8 }
%struct.S37 = type <{ i8, [7 x i8], %struct.S38, [2 x %"class.std::__1::complex"], float, [4 x i8], i64, i32, [4 x i8] }>
%struct.S38 = type { double, i8 }
%"class.std::__1::complex" = type { double, double }
%struct.S18 = type <{ i32, [4 x i8], double, double, double, i32, [4 x i8], %struct.S23, i32, [4 x i8] }>
%struct.S23 = type { [2 x double], half }
define i32 @main() {
entry:
%P0 = alloca %struct.S37, align 8
%0 = bitcast %struct.S37* %P0 to %struct.S18*
%jb1 = alloca [20 x i64], align 8
%P1 = alloca %struct.S18, align 8
%jb2 = alloca [20 x i64], align 8
%1 = bitcast %struct.S37* %P0 to i8*
%M2.i = getelementptr inbounds %struct.S37, %struct.S37* %P0, i32 0, i32 2
%2 = bitcast %struct.S38* %M2.i to i8*
call void @llvm.memset.p0i8.i64(i8* nonnull align 8 dereferenceable(48) %2, i8 0, i64 48, i1 false)
%M6.i = getelementptr inbounds %struct.S37, %struct.S37* %P0, i32 0, i32 7
store i32 0, i32* %M6.i, align 8
%3 = bitcast [20 x i64]* %jb1 to i8*
%arraydecay1 = bitcast [20 x i64]* %jb1 to i64*
%call1 = call i32 @setjmp(i64* nonnull %arraydecay1)
%tobool = icmp eq i32 %call1, 0
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
%4 = bitcast [20 x i64]* %jb1 to i64*
call void (i64*, %struct.S37*, ...) @_Z3barPx3S37z(i64* nonnull %4, %struct.S37* nonnull byval(%struct.S37) align 8 %P0)
unreachable
if.end: ; preds = %entry
%5 = bitcast [20 x i64]* %jb1 to i8*
%6 = bitcast %struct.S37* %P0 to i8*
call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{sp},~{lr}"()
%7 = bitcast %struct.S18* %0 to i8*
%BM0.i = getelementptr inbounds %struct.S18, %struct.S18* %0, i32 0, i32 2
store double 0.000000e+00, double* %BM0.i, align 8
%M0.i = getelementptr inbounds %struct.S18, %struct.S18* %0, i32 0, i32 5
store i32 42, i32* %M0.i, align 8
%M3.i = getelementptr inbounds %struct.S18, %struct.S18* %0, i32 0, i32 7
%8 = bitcast %struct.S23* %M3.i to i8*
call void @llvm.memset.p0i8.i64(i8* nonnull align 8 dereferenceable(28) %8, i8 0, i64 28, i1 false)
%9 = bitcast [20 x i64]* %jb1 to i8*
%arraydecay42 = bitcast [20 x i64]* %jb1 to i64*
%call5 = call i32 @setjmp(i64* nonnull %arraydecay42)
%tobool6 = icmp eq i32 %call5, 0
br i1 %tobool6, label %if.then7, label %if.end10
if.then7: ; preds = %if.end
%10 = bitcast [20 x i64]* %jb1 to i64*
call void (i64*, %struct.S18*, ...) @_Z3fooPx3S18z(i64* nonnull %10, %struct.S18* nonnull byval(%struct.S18) align 8 %0)
unreachable
if.end10: ; preds = %if.end
%11 = bitcast [20 x i64]* %jb1 to i8*
%12 = bitcast %struct.S18* %0 to i8*
ret i32 0
}
declare i32 @setjmp(i64*)
declare void @_Z3barPx3S37z(i64*, %struct.S37* byval(%struct.S37) align 8, ...)
declare void @_Z3fooPx3S18z(i64*, %struct.S18* byval(%struct.S18) align 8, ...)
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
...
---
name: main
exposesReturnsTwice: true
stack:
- { id: 0, name: P0, size: 80, alignment: 8, local-offset: -80 }
- { id: 1, name: jb1, size: 160, alignment: 8, local-offset: -240 }
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1(0x00000001), %bb.4(0x7fffffff)
%0:qpr = VMOVv4i32 0, 14, $noreg
%1:gpr = ADDri %stack.0.P0, 0, 14, $noreg, $noreg
%2:gpr = ADDri %1, 40, 14, $noreg, $noreg
VST1q64 %2, 0, %0, 14, $noreg
%3:gpr = ADDri %1, 24, 14, $noreg, $noreg
VST1q64 killed %3, 0, %0, 14, $noreg
%4:gpr = nuw ADDri %1, 8, 14, $noreg, $noreg
VST1q64 %4, 0, %0, 14, $noreg
%5:gpr = MOVi 0, 14, $noreg, $noreg
STRi12 %5, %stack.0.P0, 72, 14, $noreg
ADJCALLSTACKDOWN 0, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%6:gpr = ADDri %stack.1.jb1, 0, 14, $noreg, $noreg
$r0 = COPY killed %6
BL @setjmp, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def $r0
ADJCALLSTACKUP 0, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%7:gpr = COPY killed $r0
CMPri killed %7, 0, 14, $noreg, implicit-def $cpsr
Bcc %bb.4, 1, killed $cpsr
B %bb.1
bb.1:
ADJCALLSTACKDOWN 72, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%24:gpr = LDRi12 %stack.0.P0, 0, 14, $noreg
%25:gpr = LDRi12 %stack.0.P0, 4, 14, $noreg
%27:gpr = COPY $sp
%29:gpr = MOVi16 72, 14, $noreg
%61:gpr = COPY killed %29
%62:gpr = COPY killed %4
%63:gpr = COPY killed %27
bb.2:
%35:gpr = COPY killed %63
%33:gpr = COPY killed %62
%31:gpr = COPY killed %61
%32:gpr = COPY killed %33
%36:dpr, %32:gpr = VLD1d32wb_fixed %32, 0, 14, $noreg
%34:gpr = COPY killed %35
%34:gpr = VST1d32wb_fixed %34, 0, killed %36, 14, $noreg
%30:gpr = SUBri killed %31, 8, 14, $noreg, def $cpsr
%61:gpr = COPY killed %30
%62:gpr = COPY killed %32
%63:gpr = COPY killed %34
Bcc %bb.2, 1, killed $cpsr
bb.3:
successors:
%28:gpr = ADDri %stack.1.jb1, 0, 14, $noreg, $noreg
$r0 = COPY killed %28
$r2 = COPY killed %24
$r3 = COPY killed %25
BL @_Z3barPx3S37z, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit killed $r2, implicit killed $r3, implicit-def $sp
ADJCALLSTACKUP 72, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
bb.4:
successors: %bb.5(0x00000001), %bb.6(0x7fffffff)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0, 12, implicit-def dead early-clobber $r1, 12, implicit-def dead early-clobber $r2, 12, implicit-def dead early-clobber $r3, 12, implicit-def dead early-clobber $r4, 12, implicit-def dead early-clobber $r5, 12, implicit-def dead early-clobber $r6, 12, implicit-def dead early-clobber $r7, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def early-clobber $sp, 12, implicit-def dead early-clobber $lr
VST1q64 killed %2, 0, %0, 14, $noreg
%11:gpr = ADDri killed %1, 52, 14, $noreg, $noreg
VST1q32 killed %11, 0, killed %0, 14, $noreg
STRi12 %5, %stack.0.P0, 12, 14, $noreg
STRi12 killed %5, %stack.0.P0, 8, 14, $noreg
%13:gpr = MOVi 42, 14, $noreg, $noreg
STRi12 killed %13, %stack.0.P0, 32, 14, $noreg
ADJCALLSTACKDOWN 0, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%14:gpr = ADDri %stack.1.jb1, 0, 14, $noreg, $noreg
$r0 = COPY killed %14
BL @setjmp, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def $r0
ADJCALLSTACKUP 0, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%15:gpr = COPY killed $r0
CMPri killed %15, 0, 14, $noreg, implicit-def $cpsr
Bcc %bb.6, 1, killed $cpsr
B %bb.5
bb.5:
successors:
ADJCALLSTACKDOWN 64, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
%18:gpr = LDRi12 %stack.0.P0, 0, 14, $noreg
%19:gpr = LDRi12 %stack.0.P0, 4, 14, $noreg
%21:gpr = COPY $sp
%37:gpr = COPY killed %4
%39:dpr, %37:gpr = VLD1d32wb_fixed %37, 0, 14, $noreg
%38:gpr = COPY killed %21
%38:gpr = VST1d32wb_fixed %38, 0, killed %39, 14, $noreg
%40:gpr = COPY killed %37
%42:dpr, %40:gpr = VLD1d32wb_fixed %40, 0, 14, $noreg
%41:gpr = COPY killed %38
%41:gpr = VST1d32wb_fixed %41, 0, killed %42, 14, $noreg
%43:gpr = COPY killed %40
%45:dpr, %43:gpr = VLD1d32wb_fixed %43, 0, 14, $noreg
%44:gpr = COPY killed %41
%44:gpr = VST1d32wb_fixed %44, 0, killed %45, 14, $noreg
%46:gpr = COPY killed %43
%48:dpr, %46:gpr = VLD1d32wb_fixed %46, 0, 14, $noreg
%47:gpr = COPY killed %44
%47:gpr = VST1d32wb_fixed %47, 0, killed %48, 14, $noreg
%49:gpr = COPY killed %46
%51:dpr, %49:gpr = VLD1d32wb_fixed %49, 0, 14, $noreg
%50:gpr = COPY killed %47
%50:gpr = VST1d32wb_fixed %50, 0, killed %51, 14, $noreg
%52:gpr = COPY killed %49
%54:dpr, %52:gpr = VLD1d32wb_fixed %52, 0, 14, $noreg
%53:gpr = COPY killed %50
%53:gpr = VST1d32wb_fixed %53, 0, killed %54, 14, $noreg
%55:gpr = COPY killed %52
%57:dpr, %55:gpr = VLD1d32wb_fixed %55, 0, 14, $noreg
%56:gpr = COPY killed %53
%56:gpr = VST1d32wb_fixed %56, 0, killed %57, 14, $noreg
%58:gpr = COPY killed %55
%60:dpr, dead %58:gpr = VLD1d32wb_fixed %58, 0, 14, $noreg
%59:gpr = COPY killed %56
dead %59:gpr = VST1d32wb_fixed %59, 0, killed %60, 14, $noreg
%22:gpr = ADDri %stack.1.jb1, 0, 14, $noreg, $noreg
$r0 = COPY killed %22
$r2 = COPY killed %18
$r3 = COPY killed %19
BL @_Z3fooPx3S18z, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit killed $r2, implicit killed $r3, implicit-def $sp
ADJCALLSTACKUP 64, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
bb.6:
%16:gpr = MOVi 0, 14, $noreg, $noreg
$r0 = COPY killed %16
BX_RET 14, $noreg, implicit killed $r0
...
|
