forked from OSchip/llvm-project
105 lines
2.9 KiB
LLVM
105 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i64 @test0(i64 %x) {
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; CHECK-LABEL: @test0(
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[A:%.*]] = icmp eq i64 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[A]], label [[EXIT:%.*]], label [[NON_ZERO:%.*]]
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; CHECK: non_zero:
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; CHECK-NEXT: [[B:%.*]] = icmp eq i64 [[X]], 0
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; CHECK-NEXT: br i1 [[B]], label [[UNREACHABLE:%.*]], label [[EXIT]]
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; CHECK: unreachable:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[C:%.*]] = phi i64 [ 0, [[START:%.*]] ], [ 1, [[NON_ZERO]] ], [ 2, [[UNREACHABLE]] ]
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; CHECK-NEXT: ret i64 [[C]]
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;
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start:
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%a = icmp eq i64 %x, 0
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br i1 %a, label %exit, label %non_zero
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non_zero:
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%b = icmp eq i64 %x, 0
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br i1 %b, label %unreachable, label %exit
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unreachable:
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br label %exit
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exit:
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%c = phi i64 [ 0, %start ], [ 1, %non_zero ], [ 2, %unreachable ]
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ret i64 %c
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}
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define i64 @test1(i64 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[A:%.*]] = icmp eq i64 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[A]], label [[EXIT:%.*]], label [[NON_ZERO:%.*]]
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; CHECK: non_zero:
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; CHECK-NEXT: [[B:%.*]] = icmp ugt i64 [[X]], 0
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; CHECK-NEXT: br i1 [[B]], label [[EXIT]], label [[UNREACHABLE:%.*]]
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; CHECK: unreachable:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[C:%.*]] = phi i64 [ 0, [[START:%.*]] ], [ [[X]], [[NON_ZERO]] ], [ 0, [[UNREACHABLE]] ]
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; CHECK-NEXT: ret i64 [[C]]
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;
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start:
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%a = icmp eq i64 %x, 0
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br i1 %a, label %exit, label %non_zero
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non_zero:
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%b = icmp ugt i64 %x, 0
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br i1 %b, label %exit, label %unreachable
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unreachable:
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br label %exit
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exit:
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%c = phi i64 [ 0, %start ], [ %x, %non_zero ], [ 0, %unreachable ]
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ret i64 %c
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}
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define i1 @test2(i64 %x, i1 %y) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[A:%.*]] = icmp eq i64 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[A]], label [[EXIT:%.*]], label [[NON_ZERO:%.*]]
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; CHECK: non_zero:
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; CHECK-NEXT: br i1 [[Y:%.*]], label [[ONE:%.*]], label [[TWO:%.*]]
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; CHECK: one:
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; CHECK-NEXT: br label [[MAINBLOCK:%.*]]
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; CHECK: two:
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; CHECK-NEXT: br label [[MAINBLOCK]]
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; CHECK: mainblock:
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; CHECK-NEXT: [[P:%.*]] = phi i64 [ [[X]], [[ONE]] ], [ 42, [[TWO]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[P]], 0
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[RES:%.*]] = phi i1 [ [[CMP]], [[MAINBLOCK]] ], [ true, [[START:%.*]] ]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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start:
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%a = icmp eq i64 %x, 0
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br i1 %a, label %exit, label %non_zero
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non_zero:
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br i1 %y, label %one, label %two
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one:
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br label %mainblock
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two:
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br label %mainblock
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mainblock:
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%p = phi i64 [ %x, %one ], [ 42, %two ]
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%cmp = icmp eq i64 %p, 0
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br label %exit
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exit:
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%res = phi i1 [ %cmp, %mainblock ], [ 1, %start ]
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ret i1 %res
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}
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