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36bdf2dfda
The CMPZ #0 disappears during peepholing, leaving just a tADDi3, tADDi8 or t2ADDri. This avoids having to materialize the expensive negative constant in Thumb-1, and allows a shrinking from a 32-bit CMN to a 16-bit ADDS in Thumb-2. llvm-svn: 281040
34 lines
724 B
LLVM
34 lines
724 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 i1 @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 i1 %tmp
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}
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; -0x00aa00aa = 4283826006
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define i1 @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 i1 %tmp
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}
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; -0xcc00cc00 = 872363008
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define i1 @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 i1 %tmp
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}
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; -0x00110000 = 4293853184
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define i1 @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 i1 %tmp
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}
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