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90e010bd3c
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
38 lines
900 B
LLVM
38 lines
900 B
LLVM
; RUN: llc -mtriple=thumb-eabi -mcpu=arm1156t2-s -mattr=+thumb2 %s -o - | FileCheck %s
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; -0x000000bb = 4294967109
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define i32 @f1(i32 %a) {
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; CHECK-LABEL: f1:
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; CHECK: adds {{r.*}}, #187
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%tmp = icmp ne i32 %a, 4294967109
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%ret = select i1 %tmp, i32 42, i32 24
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ret i32 %ret
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}
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; -0x00aa00aa = 4283826006
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define i32 @f2(i32 %a) {
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; CHECK-LABEL: f2:
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; CHECK: cmn.w {{r.*}}, #11141290
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%tmp = icmp eq i32 %a, 4283826006
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%ret = select i1 %tmp, i32 42, i32 24
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ret i32 %ret
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}
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; -0xcc00cc00 = 872363008
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define i32 @f3(i32 %a) {
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; CHECK-LABEL: f3:
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; CHECK: cmn.w {{r.*}}, #-872363008
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%tmp = icmp ne i32 %a, 872363008
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%ret = select i1 %tmp, i32 42, i32 24
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ret i32 %ret
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}
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; -0x00110000 = 4293853184
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define i32 @f4(i32 %a) {
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; CHECK-LABEL: f4:
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; CHECK: cmn.w {{r.*}}, #1114112
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%tmp = icmp eq i32 %a, 4293853184
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%ret = select i1 %tmp, i32 42, i32 24
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ret i32 %ret
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}
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