d41059a9f6
This patch combines some cases of ARMISD::CMOV for integers that arise in comparisons of the form a != b ? x : 0 a == b ? 0 : x and that currently (e.g. in Thumb1) are emitted as branches. Differential Revision: https://reviews.llvm.org/D34515 llvm-svn: 325323
27 lines
458 B
LLVM
27 lines
458 B
LLVM
; RUN: llc -mtriple=thumb-eabi < %s | FileCheck %s
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define i1 @t1(i64 %x) {
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; CHECK-LABEL: t1:
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; CHECK: lsrs r0, r1, #31
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%B = icmp slt i64 %x, 0
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ret i1 %B
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}
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define i1 @t2(i64 %x) {
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; CHECK-LABEL: t2:
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; CHECK: movs r0, #0
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; CHECK: subs r0, r0, r1
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; CHECK: adcs r0, r1
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%tmp = icmp ult i64 %x, 4294967296
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ret i1 %tmp
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}
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define i1 @t3(i32 %x) {
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; CHECK-LABEL: t3:
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; CHECK: movs r0, #0
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%tmp = icmp ugt i32 %x, -1
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ret i1 %tmp
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}
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; CHECK-NOT: cmp
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