2017-07-11 18:39:01 +08:00
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; RUN: opt %loadPolly -polly-import-jscop \
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Relax assert when setting access functions with invariant base pointers
Summary:
Instead of forbidding such access functions completely, we verify that their
base pointer has been hoisted and only assert in case the base pointer was
not hoisted.
I was trying for a little while to get a test case that ensures the assert is
correctly fired in case of invariant load hoisting being disabled, but I could
not find a good way to do so, as llvm-lit immediately aborts if a command
yields a non-zero return value. As we do not generally test our asserts,
not having a test case here seems OK.
This resolves http://llvm.org/PR31494
Suggested-by: Michael Kruse <llvm@meinersbur.de>
Reviewers: efriedma, jdoerfert, Meinersbur, gareevroman, sebpop, zinob, huihuiz, pollydev
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D28798
llvm-svn: 292213
2017-01-17 20:00:42 +08:00
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; RUN: -polly-codegen -polly-invariant-load-hoisting -S \
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; RUN: 2>&1 < %s | FileCheck %s
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2017-01-17 01:51:28 +08:00
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; Setting new access functions where the base pointer of the array that is newly
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; accessed is only loaded within the scop itself caused incorrect code to be
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Relax assert when setting access functions with invariant base pointers
Summary:
Instead of forbidding such access functions completely, we verify that their
base pointer has been hoisted and only assert in case the base pointer was
not hoisted.
I was trying for a little while to get a test case that ensures the assert is
correctly fired in case of invariant load hoisting being disabled, but I could
not find a good way to do so, as llvm-lit immediately aborts if a command
yields a non-zero return value. As we do not generally test our asserts,
not having a test case here seems OK.
This resolves http://llvm.org/PR31494
Suggested-by: Michael Kruse <llvm@meinersbur.de>
Reviewers: efriedma, jdoerfert, Meinersbur, gareevroman, sebpop, zinob, huihuiz, pollydev
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D28798
llvm-svn: 292213
2017-01-17 20:00:42 +08:00
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; generated when invariant load hoisting is disabled. This test case checks
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; that in case invariant load hoisting is enabled, we generate correct code.
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2017-01-17 01:51:28 +08:00
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2017-01-17 15:03:25 +08:00
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; CHECK: %polly.access.polly.access.X.load = getelementptr float, float* %polly.access.X.load, i64 %polly.indvar
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2017-01-17 01:51:28 +08:00
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define void @invariant_base_ptr(float* noalias %Array, float** noalias %X,
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float* noalias %C) {
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start:
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br label %loop
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loop:
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%indvar = phi i64 [0, %start], [%indvar.next, %latch]
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%indvar.next = add i64 %indvar, 1
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%cmp = icmp slt i64 %indvar, 1024
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br i1 %cmp, label %body, label %exit
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body:
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%gep= getelementptr float, float* %Array, i64 %indvar
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store float 42.0, float* %gep
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br label %body2
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body2:
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%Base = load float*, float** %X
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%gep2 = getelementptr float, float* %Base, i64 %indvar
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%val2 = load float, float* %gep2
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store float %val2, float* %C
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br label %latch
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latch:
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br label %loop
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exit:
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ret void
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}
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