79 lines
2.4 KiB
LLVM
79 lines
2.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S < %s -instcombine | FileCheck %s
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; Fold
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; sub %Op0, (select %Cond, %TrueVal, %FalseVal)
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; to
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; select %Cond, (sub %Op0, %TrueVal), (sub %Op0, %FalseVal)
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; https://bugs.llvm.org/show_bug.cgi?id=44426
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; Base tests
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define i8 @t0_sub_from_trueval(i1 %c, i8 %Op0, i8 %FalseVal) {
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; CHECK-LABEL: @t0_sub_from_trueval(
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 [[OP0:%.*]], [[FALSEVAL:%.*]]
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; CHECK-NEXT: [[R:%.*]] = select i1 [[C:%.*]], i8 0, i8 [[TMP1]], !prof !0
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; CHECK-NEXT: ret i8 [[R]]
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;
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%o = select i1 %c, i8 %Op0, i8 %FalseVal, !prof !0 ; while there, ensure preservation of prof md
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%r = sub i8 %Op0, %o
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ret i8 %r
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}
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define i8 @t1_sub_from_falseval(i1 %c, i8 %TrueVal, i8 %Op0) {
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; CHECK-LABEL: @t1_sub_from_falseval(
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; CHECK-NEXT: [[TMP1:%.*]] = sub i8 [[OP0:%.*]], [[TRUEVAL:%.*]]
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; CHECK-NEXT: [[R:%.*]] = select i1 [[C:%.*]], i8 [[TMP1]], i8 0, !prof !0
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; CHECK-NEXT: ret i8 [[R]]
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;
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%o = select i1 %c, i8 %TrueVal, i8 %Op0, !prof !0 ; while there, ensure preservation of prof md
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%r = sub i8 %Op0, %o
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ret i8 %r
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}
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; Vectors
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define <2 x i8> @t2_vec(i1 %c, <2 x i8> %Op0, <2 x i8> %FalseVal) {
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; CHECK-LABEL: @t2_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = sub <2 x i8> [[OP0:%.*]], [[FALSEVAL:%.*]]
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; CHECK-NEXT: [[R:%.*]] = select i1 [[C:%.*]], <2 x i8> zeroinitializer, <2 x i8> [[TMP1]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%o = select i1 %c, <2 x i8> %Op0, <2 x i8> %FalseVal
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%r = sub <2 x i8> %Op0, %o
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ret <2 x i8> %r
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}
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; Extra use
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declare void @use8(i8)
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define i8 @n3_extrause(i1 %c, i8 %Op0, i8 %FalseVal) {
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; CHECK-LABEL: @n3_extrause(
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; CHECK-NEXT: [[O:%.*]] = select i1 [[C:%.*]], i8 [[OP0:%.*]], i8 [[FALSEVAL:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[O]])
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; CHECK-NEXT: [[R:%.*]] = sub i8 [[OP0]], [[O]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%o = select i1 %c, i8 %Op0, i8 %FalseVal
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call void @use8(i8 %o)
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%r = sub i8 %Op0, %o
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ret i8 %r
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}
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; Negative tests
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define i8 @n4_wrong_hands(i1 %c, i8 %TrueVal, i8 %FalseVal, i8 %Op0) {
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; CHECK-LABEL: @n4_wrong_hands(
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; CHECK-NEXT: [[O:%.*]] = select i1 [[C:%.*]], i8 [[TRUEVAL:%.*]], i8 [[FALSEVAL:%.*]]
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; CHECK-NEXT: [[R:%.*]] = sub i8 [[OP0:%.*]], [[O]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%o = select i1 %c, i8 %TrueVal, i8 %FalseVal ; none of the hands is %Op0
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%r = sub i8 %Op0, %o
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ret i8 %r
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}
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; CHECK: !0 = !{!"branch_weights", i32 0, i32 100}
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!0 = !{!"branch_weights", i32 0, i32 100}
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