v1i8 = fp_to_sint gets assertion failure

[llvmbot]

Bugzilla Link	2671
Resolution	FIXED
Resolved on	Aug 14, 2008 15:15
Version	trunk
OS	Linux
Attachments	llvm ir file which reproduces the problem
Reporter	LLVM Bugzilla Contributor
CC	@sunfishcode

Extended Description

-Mcpu=core2

The attached program gets the assertion failure

0x8268514: v1i8 = fp_to_sint 0x826815c
conversions: LegalizeDAG.cpp:6927: llvm::SDValue::SelectionDAGLegalize::ScalarizeVectorOp(llvm::SDValue): Assertion `0 && "Unknown vector operation in ScalarizeVectorOp!"' failed.

This also happens if fptosi is changed to fptoui.

[sunfishcode]

This patch:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20080811/065958.html
fixes this and several related issues. The attached testcase, and the testcase
changed to use fptoui, can now be codegened without abort.

[ggreif]

mentioned in issue llvm/llvm-bugzilla-archive#3683