https://llvm.org/bugs/show_bug.cgi?id=27718
Bug ID: 27718
Summary: PowerPC64: Simple floating point code hits machine
verifier failure
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: unassignedb...@nondot.org
Reporter: an...@samba.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The following testcase:
void fn1(void) { float a = 1; }
when built with:
clang -c -O0 -mllvm -verify-machineinstrs /tmp/testcase.c
hits a machine verifier failure:
# After Instruction Selection
# Machine code for function fn1: Properties: <>
Frame Objects:
fi#0: size=4, align=4, at location [SP]
Constant Pool:
cp#0: 1.000000e+00, align=4
BB#0: derived from LLVM BB %0
%vreg1<def> = ADDIStocHA %X2, <cp#0>; G8RC_and_G8RC_NOX0:%vreg1
%vreg0<def> = LFS <cp#0>[TF=112], %vreg1; mem:LD4[ConstantPool]
VSSRC:%vreg0 G8RC_and_G8RC_NOX0:%vreg1
%vreg2<def> = LIS 16256; GPRC:%vreg2
STW %vreg2<kill>, 0, <fi#0>; mem:ST4[%1] GPRC:%vreg2
BLR8 %LR8<imp-use>, %RM<imp-use>
# End machine code for function fn1.
*** Bad machine code: Illegal virtual register for instruction ***
- function: fn1
- basic block: BB#0 (0x1000ef8b780)
- instruction: %vreg0<def> = LFS
- operand 0: %vreg0<def>
Expected a F4RC register, but got a VSSRC register
fatal error: error in backend: Found 1 machine code errors.
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