2d3d4ec860
When introducing separate control flow for the original and optimized code we
introduce now a special 'ExitingBlock':
\ /
EnteringBB
|
SplitBlock---------\
_____|_____ |
/ EntryBB \ StartBlock
| (region) | |
\_ExitingBB_/ ExitingBlock
| |
MergeBlock---------/
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ExitBB
/ \
This 'ExitingBlock' contains code such as the final_reloads for scalars, which
previously were just added to whichever statement/loop_exit/branch-merge block
had been generated last. Having an explicit basic block makes it easier to
find these constructs when looking at the CFG.
llvm-svn: 255107
33 lines
801 B
LLVM
33 lines
801 B
LLVM
; RUN: opt %loadPolly -polly-codegen -S < %s | FileCheck %s
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;
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;
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; CHECK: polly.merge_new_and_old:
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; CHECK: %sumA.merge = phi float [ %sumA.final_reload, %polly.exiting ], [ %sumA, %loopA ]
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; CHECK: br label %next
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;
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; CHECK: next:
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; CHECK: %result = phi float [ %sumA.merge, %polly.merge_new_and_old ]
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; CHECK: ret float %result
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;
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define float @foo(float* %A, i64 %param) {
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entry:
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br label %entry.split
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entry.split:
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br label %loopA
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loopA:
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%indvarA = phi i64 [0, %entry.split], [%indvar.nextA, %loopA]
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%indvar.nextA = add i64 %indvarA, 1
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%valA = load float, float* %A
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%sumA = fadd float %valA, %valA
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store float %valA, float* %A
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%cndA = icmp eq i64 %indvar.nextA, 100
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br i1 %cndA, label %next, label %loopA
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next:
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%result = phi float [%sumA, %loopA]
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ret float %result
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}
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