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
23 lines
475 B
LLVM
23 lines
475 B
LLVM
; RUN: llc < %s -mtriple thumbv7-apple-ios | FileCheck %s
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; <rdar://problem/7569620>
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define i32 @compare_i_gt(i32 %a) {
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entry:
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; CHECK: compare_i_gt
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; CHECK-NOT: mvn
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; CHECK: cmn
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%cmp = icmp sgt i32 %a, -78
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%ret = select i1 %cmp, i32 42, i32 24
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ret i32 %ret
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}
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define i32 @compare_r_eq(i32 %a, i32 %b) {
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entry:
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; CHECK: compare_r_eq
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; CHECK: cmn
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%sub = sub nsw i32 0, %b
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%cmp = icmp eq i32 %a, %sub
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%ret = select i1 %cmp, i32 42, i32 24
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ret i32 %ret
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}
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