35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; Instcombine normally would fold the sdiv into the comparison,
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; making "icmp slt i32 %h, 2", but in this case the sdiv has
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; another use, so it wouldn't a big win, and it would also
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; obfuscate an otherise obvious smax pattern to the point where
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; other analyses wouldn't recognize it.
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define i32 @foo(i32 %h) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: [[SD:%.*]] = sdiv i32 [[H:%.*]], 2
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; CHECK-NEXT: [[T:%.*]] = icmp slt i32 [[SD]], 1
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; CHECK-NEXT: [[R:%.*]] = select i1 [[T]], i32 [[SD]], i32 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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%sd = sdiv i32 %h, 2
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%t = icmp slt i32 %sd, 1
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%r = select i1 %t, i32 %sd, i32 1
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ret i32 %r
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}
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define i32 @bar(i32 %h) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: [[SD:%.*]] = sdiv i32 [[H:%.*]], 2
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; CHECK-NEXT: [[T:%.*]] = icmp sgt i32 [[SD]], 1
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; CHECK-NEXT: [[R:%.*]] = select i1 [[T]], i32 [[SD]], i32 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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%sd = sdiv i32 %h, 2
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%t = icmp sgt i32 %sd, 1
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%r = select i1 %t, i32 %sd, i32 1
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ret i32 %r
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}
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