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7abfec8734
(3) Do not reduce element sizes of small power of two:
char s[10];
for (i)
...s[i] ...
when the indvar is not eliminable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20502 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
568 B
LLVM
22 lines
568 B
LLVM
; Don't reduce the byte access to P[i], at least not on targets that
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; support an efficient 'mem[r1+r2]' addressing mode.
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; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'getelementptr.*PTR.*INDVAR'
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declare bool %pred(int)
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void %test(sbyte* %PTR) {
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br label %Loop
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Loop:
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%INDVAR = phi int [0, %0], [%INDVAR2, %Loop]
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%STRRED = getelementptr sbyte* %PTR, int %INDVAR
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store sbyte 0, sbyte* %STRRED
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%INDVAR2 = add int %INDVAR, 1
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%cond = call bool %pred(int %INDVAR2) ;; cannot eliminate indvar
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br bool %cond, label %Loop, label %Out
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Out:
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ret void
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}
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