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108f359996
We only used to add the edge from the cloned loop to PHIs that corresponded to values defined by the loop. We need to do this for all PHIs obviously since we need a PHI operand for each incoming edge. This includes things like PHIs with a constant value or with values defined before the original loop (see the testcases). After the patch the PHIs are added to the exit block in two passes. In the first pass we ensure there is a single-operand (LCSSA) PHI for each value defined by the loop. In the second pass we loop through each (single-operand) PHI and add the value for the edge from the cloned loop. If the value is defined in the loop we'll use the cloned instruction from the cloned loop. Fixes PR28037 llvm-svn: 272649 |
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