138 lines
3.5 KiB
LLVM
138 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -constraint-elimination -S %s | FileCheck %s
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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; Test cases where both the true and false successors reach the same block,
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; dominated by one of them.
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declare void @use(i1)
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define i32 @test1(i32 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
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; CHECK-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ule i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: br label [[BB2]]
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; CHECK: bb2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ugt i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: ret i32 20
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;
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entry:
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%c.1 = icmp ule i32 %x, 10
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br i1 %c.1, label %bb1, label %bb2
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bb1:
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%c.2 = icmp ule i32 %x, 10
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call void @use(i1 %c.2)
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br label %bb2
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bb2:
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%c.3 = icmp ugt i32 %x, 10
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call void @use(i1 %c.3)
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ret i32 20
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}
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define i32 @test2(i32 %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
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; CHECK-NEXT: br i1 [[C_1]], label [[BB2:%.*]], label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 [[C_2]])
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; CHECK-NEXT: ret i32 20
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; CHECK: bb2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ule i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: br label [[BB1]]
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;
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entry:
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%c.1 = icmp ule i32 %x, 10
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br i1 %c.1, label %bb2, label %bb1
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bb1:
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%c.2 = icmp ugt i32 %x, 10
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call void @use(i1 %c.2)
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ret i32 20
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bb2:
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%c.3 = icmp ule i32 %x, 10
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call void @use(i1 %c.3)
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br label %bb1
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}
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; Test cases where the true/false successors are not domianted by the conditional branching block.
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define i32 @test3(i32 %x, i1 %c) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB_COND:%.*]], label [[BB1:%.*]]
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; CHECK: bb.cond:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
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; CHECK-NEXT: br i1 [[C_1]], label [[BB1]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ule i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 [[C_2]])
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; CHECK-NEXT: ret i32 10
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; CHECK: bb2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ugt i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: ret i32 20
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;
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entry:
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br i1 %c, label %bb.cond, label %bb1
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bb.cond:
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%c.1 = icmp ule i32 %x, 10
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br i1 %c.1, label %bb1, label %bb2
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bb1:
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%c.2 = icmp ule i32 %x, 10
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call void @use(i1 %c.2)
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ret i32 10
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bb2:
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%c.3 = icmp ugt i32 %x, 10
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call void @use(i1 %c.3)
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ret i32 20
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}
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define i32 @test4(i32 %x, i1 %c) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB_COND:%.*]], label [[BB2:%.*]]
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; CHECK: bb.cond:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
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; CHECK-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[BB2]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ule i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: ret i32 10
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; CHECK: bb2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ugt i32 [[X]], 10
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: ret i32 20
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;
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entry:
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br i1 %c, label %bb.cond, label %bb2
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bb.cond:
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%c.1 = icmp ule i32 %x, 10
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br i1 %c.1, label %bb1, label %bb2
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bb1:
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%c.2 = icmp ule i32 %x, 10
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call void @use(i1 %c.2)
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ret i32 10
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bb2:
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%c.3 = icmp ugt i32 %x, 10
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call void @use(i1 %c.3)
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ret i32 20
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}
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