derek.holloway
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75 lines
1.7 KiB
LLVM
75 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; PR3021
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; When inst combining an FCMP with the LHS coming from a uitofp instruction, we
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; can't lower it to signed ICMP instructions.
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define i1 @test1(i32 %val) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[VAL:%.*]], 0
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; CHECK-NEXT: ret i1 [[TMP1]]
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp ole double %1, 0.000000e+00
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ret i1 %2
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}
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define i1 @test2(i32 %val) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret i1 false
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp olt double %1, 0.000000e+00
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ret i1 %2
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}
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define i1 @test3(i32 %val) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: ret i1 true
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp oge double %1, 0.000000e+00
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ret i1 %2
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}
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define i1 @test4(i32 %val) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i32 [[VAL:%.*]], 0
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; CHECK-NEXT: ret i1 [[TMP1]]
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp ogt double %1, 0.000000e+00
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ret i1 %2
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}
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define i1 @test5(i32 %val) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret i1 true
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp ogt double %1, -4.400000e+00
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ret i1 %2
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}
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define i1 @test6(i32 %val) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: ret i1 false
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp olt double %1, -4.400000e+00
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ret i1 %2
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}
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; Check that optimizing unsigned >= comparisons correctly distinguishes
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; positive and negative constants. <rdar://problem/12029145>
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define i1 @test7(i32 %val) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[VAL:%.*]], 3
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; CHECK-NEXT: ret i1 [[TMP1]]
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;
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%1 = uitofp i32 %val to double
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%2 = fcmp oge double %1, 3.200000e+00
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ret i1 %2
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}
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