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c5041cac7d
A MOVCCr instruction can be commuted by inverting the condition. This can help reduce register pressure and remove unnecessary copies in some cases. <rdar://problem/11182914> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154033 91177308-0d34-0410-b5e6-96231b3b80d8
115 lines
2.1 KiB
LLVM
115 lines
2.1 KiB
LLVM
; RUN: llc < %s -march=arm | FileCheck %s --check-prefix=ARM
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; RUN: llc < %s -march=arm -mattr=+thumb2 | FileCheck %s --check-prefix=ARMT2
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; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s --check-prefix=THUMB2
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define i32 @t1(i32 %c) nounwind readnone {
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entry:
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; ARM: t1:
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; ARM: mov [[R1:r[0-9]+]], #101
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; ARM: orr [[R1b:r[0-9]+]], [[R1]], #256
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; ARM: movgt r0, #123
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; ARMT2: t1:
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; ARMT2: movw r0, #357
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; ARMT2: movgt r0, #123
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; THUMB2: t1:
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; THUMB2: movw r0, #357
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; THUMB2: movgt r0, #123
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%0 = icmp sgt i32 %c, 1
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%1 = select i1 %0, i32 123, i32 357
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ret i32 %1
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}
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define i32 @t2(i32 %c) nounwind readnone {
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entry:
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; ARM: t2:
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; ARM: mov r0, #123
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; ARM: movgt r0, #101
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; ARM: orrgt r0, r0, #256
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; ARMT2: t2:
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; ARMT2: mov r0, #123
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; ARMT2: movwgt r0, #357
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; THUMB2: t2:
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; THUMB2: mov{{(s|\.w)}} r0, #123
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; THUMB2: movwgt r0, #357
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%0 = icmp sgt i32 %c, 1
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%1 = select i1 %0, i32 357, i32 123
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ret i32 %1
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}
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define i32 @t3(i32 %a) nounwind readnone {
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entry:
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; ARM: t3:
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; ARM: mov r0, #0
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; ARM: moveq r0, #1
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; ARMT2: t3:
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; ARMT2: mov r0, #0
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; ARMT2: moveq r0, #1
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; THUMB2: t3:
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; THUMB2: mov{{(s|\.w)}} r0, #0
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; THUMB2: moveq r0, #1
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%0 = icmp eq i32 %a, 160
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%1 = zext i1 %0 to i32
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ret i32 %1
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}
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define i32 @t4(i32 %a, i32 %b, i32 %x) nounwind {
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entry:
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; ARM: t4:
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; ARM: ldr
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; ARM: mov{{lt|ge}}
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; ARMT2: t4:
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; ARMT2: movwlt [[R0:r[0-9]+]], #65365
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; ARMT2: movtlt [[R0]], #65365
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; THUMB2: t4:
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; THUMB2: mvnlt [[R0:r[0-9]+]], #11141290
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%0 = icmp slt i32 %a, %b
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%1 = select i1 %0, i32 4283826005, i32 %x
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ret i32 %1
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}
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; rdar://9758317
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define i32 @t5(i32 %a) nounwind {
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entry:
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; ARM: t5:
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; ARM-NOT: mov
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; ARM: cmp r0, #1
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; ARM-NOT: mov
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; ARM: movne r0, #0
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; THUMB2: t5:
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; THUMB2-NOT: mov
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; THUMB2: cmp r0, #1
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; THUMB2: it ne
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; THUMB2: movne r0, #0
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%cmp = icmp eq i32 %a, 1
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%conv = zext i1 %cmp to i32
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ret i32 %conv
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}
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define i32 @t6(i32 %a) nounwind {
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entry:
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; ARM: t6:
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; ARM-NOT: mov
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; ARM: cmp r0, #0
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; ARM: movne r0, #1
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; THUMB2: t6:
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; THUMB2-NOT: mov
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; THUMB2: cmp r0, #0
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; THUMB2: it ne
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; THUMB2: movne r0, #1
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%tobool = icmp ne i32 %a, 0
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%lnot.ext = zext i1 %tobool to i32
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ret i32 %lnot.ext
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}
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