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llvm-mirror/test/CodeGen/SystemZ/locr-legal-regclass.ll
Jonas Paulsson de98d3678e [SystemZ] Make sure of correct regclasses in insertSelect()
Since LOCR only accepts GR32 virtual registers, its operands must be copied
into this regclass in insertSelect(), when an LOCR is built. Otherwise, the
case where the source operand was GRX32 will produce invalid IR.

Review: Ulrich Weigand
llvm-svn: 299220
2017-03-31 14:06:59 +00:00

21 lines
657 B
LLVM

; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=zEC12 -verify-machineinstrs | FileCheck %s
;
; Test that early if conversion produces LOCR with operands of the right
; register classes.
define void @autogen_SD4739(i8*) {
; CHECK-NOT: Expected a GR32Bit register, but got a GRX32Bit register
BB:
%L34 = load i8, i8* %0
%Cmp56 = icmp sgt i8 undef, %L34
br label %CF246
CF246: ; preds = %CF246, %BB
%Sl163 = select i1 %Cmp56, i8 %L34, i8 undef
br i1 undef, label %CF246, label %CF248
CF248: ; preds = %CF248, %CF246
store i8 %Sl163, i8* %0
br label %CF248
}