commit bcd8ea0e2d4d3ef3dcb63079ecbd48b232ceb4f5
author Sanjay Patel <spatel@rotateright.com> Thu Feb 07 21:12:01 2019 +0000
committer Sanjay Patel <spatel@rotateright.com> Thu Feb 07 21:12:01 2019 +0000
tree f64e8c61c747ee246e8fdea8b4466baf77f31ebd
parent 6e3888c2a4524cc96ea26a7e10e431e59b5c5a13

[InstCombine] Fix crashing from (icmp (bitcast ([su]itofp X)), Y)

This fixes a class of bugs introduced by D44367, 
which transforms various cases of icmp (bitcast ([su]itofp X)), Y to icmp X, Y. 
If the bitcast is between vector types with a different number of elements, 
the current code will produce bad IR along the lines of: icmp <N x i32> ..., <M x i32> <...>.

This patch suppresses the transform if the bitcast changes the number of vector elements.

Patch by: @AndrewScheidecker (Andrew Scheidecker)

Differential Revision: https://reviews.llvm.org/D57871


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353467 91177308-0d34-0410-b5e6-96231b3b80d8