99 lines
2.7 KiB
LLVM
99 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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define i1 @test_conds_single_use_in_different_blocks(i8 %x) {
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; CHECK-LABEL: @test_conds_single_use_in_different_blocks(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
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; CHECK-NEXT: [[T_1:%.*]] = icmp ugt i8 [[X]], 5
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; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[X]], 5
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; CHECK-NEXT: br i1 [[C_1]], label [[THEN:%.*]], label [[ELSE:%.*]]
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; CHECK: then:
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; CHECK-NEXT: ret i1 [[T_1]]
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; CHECK: else:
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; CHECK-NEXT: ret i1 [[C_2]]
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;
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entry:
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%c.1 = icmp ugt i8 %x, 10
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%t.1 = icmp ugt i8 %x, 5
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%c.2 = icmp ugt i8 %x, 5
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br i1 %c.1, label %then, label %else
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then:
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ret i1 %t.1
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else:
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ret i1 %c.2
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}
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define i1 @test_conds_single_use_in_different_blocks_2(i8 %x, i8 %y) {
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; CHECK-LABEL: @test_conds_single_use_in_different_blocks_2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
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; CHECK-NEXT: [[T_1:%.*]] = icmp ugt i8 [[Y:%.*]], 5
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; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[Y]], [[X]]
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; CHECK-NEXT: [[C_3:%.*]] = icmp ugt i8 [[Y]], 5
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; CHECK-NEXT: br i1 [[C_1]], label [[THEN_1:%.*]], label [[ELSE:%.*]]
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; CHECK: then.1:
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; CHECK-NEXT: br i1 [[C_2]], label [[THEN_2:%.*]], label [[ELSE]]
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; CHECK: then.2:
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; CHECK-NEXT: ret i1 [[T_1]]
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; CHECK: else:
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; CHECK-NEXT: ret i1 [[C_3]]
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;
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entry:
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%c.1 = icmp ugt i8 %x, 10
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%t.1 = icmp ugt i8 %y, 5
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%c.2 = icmp ugt i8 %y, %x
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%c.3 = icmp ugt i8 %y, 5
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br i1 %c.1, label %then.1, label %else
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then.1:
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br i1 %c.2, label %then.2, label %else
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then.2:
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ret i1 %t.1
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else:
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ret i1 %c.3
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}
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declare void @llvm.assume(i1)
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; Only the use of %t.1 in %then.2 could be simplified, but not the one in
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; %entry.
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define i1 @test_conds_multiple_uses_in_different_blocks_2(i8 %x, i8 %y) {
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; CHECK-LABEL: @test_conds_multiple_uses_in_different_blocks_2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
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; CHECK-NEXT: [[T_1:%.*]] = icmp ugt i8 [[Y:%.*]], 5
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; CHECK-NEXT: call void @llvm.assume(i1 [[T_1]])
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; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[Y]], [[X]]
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; CHECK-NEXT: [[C_3:%.*]] = icmp ugt i8 [[Y]], 5
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; CHECK-NEXT: br i1 [[C_1]], label [[THEN_1:%.*]], label [[ELSE:%.*]]
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; CHECK: then.1:
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; CHECK-NEXT: br i1 [[C_2]], label [[THEN_2:%.*]], label [[ELSE]]
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; CHECK: then.2:
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; CHECK-NEXT: ret i1 true
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; CHECK: else:
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; CHECK-NEXT: ret i1 true
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;
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entry:
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%c.1 = icmp ugt i8 %x, 10
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%t.1 = icmp ugt i8 %y, 5
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call void @llvm.assume(i1 %t.1)
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%c.2 = icmp ugt i8 %y, %x
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%c.3 = icmp ugt i8 %y, 5
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br i1 %c.1, label %then.1, label %else
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then.1:
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br i1 %c.2, label %then.2, label %else
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then.2:
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ret i1 %t.1
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else:
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ret i1 %c.3
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}
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