llvm-6502/test/CodeGen/Mips/sel2c.ll
Matheus Almeida bc7114feab [mips] Small code generation improvement for conditional operator (select)
in case the operands are constants and its difference is |1|.
It should be possible in those cases to rematerialize the result using
MIPS's slt and similar instructions.

The small update to some of the tests in cmov.ll, sel1c.ll and sel2c.ll was needed
otherwise the optimization implemented in this patch would have been triggered
(difference between the operands was 1) and that would have changed the semantic
of the tests.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196498 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-05 12:07:05 +00:00

22 lines
808 B
LLVM

; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=pic -mips16-constant-islands < %s | FileCheck %s -check-prefix=cond-b-short
@i = global i32 1, align 4
@j = global i32 2, align 4
@k = common global i32 0, align 4
; Function Attrs: nounwind optsize
define void @t() #0 {
entry:
%0 = load i32* @i, align 4
%1 = load i32* @j, align 4
%cmp = icmp ne i32 %0, %1
%cond = select i1 %cmp, i32 1, i32 3
store i32 %cond, i32* @k, align 4
; cond-b-short: btnez $BB0_{{[0-9]+}} # 16 bit inst
ret void
}
attributes #0 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="true" }