141 lines
4.8 KiB
YAML
141 lines
4.8 KiB
YAML
# RUN: llc -o - %s -mtriple=x86_64-pc-windows-msvc -run-pass=machinelicm | FileCheck %s
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#
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# This test checks that MachineLICM doesn't hoist loads out of funclets.
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# Manually modified from the IR of the following C++ function by running
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# llc -stop-after=machine-cp.
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#
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# void may_throw();
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# void use(int);
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#
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# void test(int n, int arg)
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# {
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# for (int i = 0 ; i < n ; i++)
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# try {
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# may_throw();
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# }
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# catch (...) {
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# // Two uses to get 'arg' allocated to a register
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# use(arg);
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# use(arg);
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# }
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# }
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--- |
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target triple = "x86_64-pc-windows-msvc"
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define void @test(i32 %n, i32 %arg) personality ptr @__CxxFrameHandler3 {
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entry:
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%cmp3 = icmp sgt i32 %n, 0
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br i1 %cmp3, label %for.body.preheader, label %for.cond.cleanup
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.cond.cleanup: ; preds = %for.inc, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.inc
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%lsr.iv = phi i32 [ %n, %for.body.preheader ], [ %lsr.iv.next, %for.inc ]
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invoke void @may_throw()
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to label %for.inc unwind label %catch.dispatch
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catch.dispatch: ; preds = %for.body
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%0 = catchswitch within none [label %catch] unwind to caller
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catch: ; preds = %catch.dispatch
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%1 = catchpad within %0 [ptr null, i32 64, ptr null]
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call void @use(i32 %arg) [ "funclet"(token %1) ]
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call void @use(i32 %arg) [ "funclet"(token %1) ]
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catchret from %1 to label %for.inc
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for.inc: ; preds = %catch, %for.body
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%lsr.iv.next = add i32 %lsr.iv, -1
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%exitcond.not = icmp eq i32 %lsr.iv.next, 0
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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}
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declare i32 @__CxxFrameHandler3(...)
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declare void @may_throw()
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declare void @use(i32)
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...
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---
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name: test
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alignment: 16
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tracksRegLiveness: true
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hasEHCatchret: true
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hasEHScopes: true
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hasEHFunclets: true
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debugInstrRef: true
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tracksDebugUserValues: true
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liveins:
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- { reg: '$ecx' }
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- { reg: '$edx' }
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frameInfo:
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maxAlignment: 8
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hasCalls: true
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hasOpaqueSPAdjustment: true
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stack:
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- { id: 0, type: spill-slot, size: 4, alignment: 4 }
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- { id: 1, type: spill-slot, size: 4, alignment: 4 }
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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successors: %bb.1, %bb.2
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liveins: $ecx, $edx
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MOV32mr %stack.1, 1, $noreg, 0, $noreg, $edx :: (store (s32) into %stack.1)
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TEST32rr renamable $ecx, renamable $ecx, implicit-def $eflags
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JCC_1 %bb.2, 14, implicit killed $eflags
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bb.1:
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liveins: $ecx
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JMP_1 %bb.3
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bb.2.for.cond.cleanup:
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RET 0
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bb.3.for.body:
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successors: %bb.5, %bb.4
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liveins: $ecx
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EH_LABEL <mcsymbol .Leh1>
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MOV32mr %stack.0, 1, $noreg, 0, $noreg, killed renamable $ecx :: (store (s32) into %stack.0)
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ADJCALLSTACKDOWN64 32, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 @may_throw, csr_win64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp
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ADJCALLSTACKUP64 32, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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EH_LABEL <mcsymbol .Leh2>
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JMP_1 %bb.5
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bb.4.catch (landing-pad, ehfunclet-entry):
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successors: %bb.5
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ADJCALLSTACKDOWN64 32, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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renamable $esi = MOV32rm %stack.1, 1, $noreg, 0, $noreg :: (load (s32) from %stack.1)
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$ecx = COPY renamable $esi
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CALL64pcrel32 @use, csr_win64, implicit $rsp, implicit $ssp, implicit $ecx, implicit-def $rsp, implicit-def $ssp
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ADJCALLSTACKUP64 32, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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ADJCALLSTACKDOWN64 32, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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$ecx = COPY killed renamable $esi
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CALL64pcrel32 @use, csr_win64, implicit $rsp, implicit $ssp, implicit $ecx, implicit-def $rsp, implicit-def $ssp
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ADJCALLSTACKUP64 32, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CATCHRET %bb.5, %bb.0
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bb.5.for.inc:
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successors: %bb.2, %bb.3
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renamable $ecx = MOV32rm %stack.0, 1, $noreg, 0, $noreg :: (load (s32) from %stack.0)
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renamable $ecx = DEC32r killed renamable $ecx, implicit-def $eflags
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JCC_1 %bb.2, 4, implicit killed $eflags
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JMP_1 %bb.3
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...
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#
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# CHECK: bb.4.catch
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# CHECK: ADJCALLSTACKDOWN64
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# CHECK-NEXT: renamable [[REG:\$[a-z0-9]+]] = MOV32rm %stack.1
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# CHECK-NEXT: $ecx = COPY renamable [[REG]]
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# CHECK-NEXT: CALL64pcrel32 @use
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