33 lines
1.3 KiB
LLVM
33 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -nary-reassociate -S | FileCheck %s
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; RUN: opt < %s -passes='nary-reassociate' -S | FileCheck %s
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declare i32 @llvm.smax.i32(i32 %a, i32 %b)
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; This is a negative test. We should not optimize if intermediate result
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; has a use outside of optimizaple pattern. In other words %smax2 has one
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; use from %smax3 and side use from %res2.
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define i32 @smax_test1(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @smax_test1(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SMAX1:%.*]] = select i1 [[C1]], i32 [[A]], i32 [[B]]
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; CHECK-NEXT: [[C2:%.*]] = icmp sgt i32 [[B]], [[C:%.*]]
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; CHECK-NEXT: [[SMAX2:%.*]] = select i1 [[C2]], i32 [[B]], i32 [[C]]
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; CHECK-NEXT: [[C3:%.*]] = icmp sgt i32 [[SMAX2]], [[A]]
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; CHECK-NEXT: [[SMAX3:%.*]] = select i1 [[C3]], i32 [[SMAX2]], i32 [[A]]
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[SMAX1]], [[SMAX3]]
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; CHECK-NEXT: [[RES2:%.*]] = add i32 [[RES]], [[SMAX2]]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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%c1 = icmp sgt i32 %a, %b
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%smax1 = select i1 %c1, i32 %a, i32 %b
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%c2 = icmp sgt i32 %b, %c
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%smax2 = select i1 %c2, i32 %b, i32 %c
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%c3 = icmp sgt i32 %smax2, %a
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%smax3 = select i1 %c3, i32 %smax2, i32 %a
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%res = add i32 %smax1, %smax3
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%res2 = add i32 %res, %smax2
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ret i32 %res
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}
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