126 lines
3.7 KiB
LLVM
126 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -correlated-propagation -S | FileCheck %s
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; RUN: opt < %s -passes="correlated-propagation" -S | FileCheck %s
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define i8* @simplify_phi_common_value_op0(i8* %ptr, i32* %b) {
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; CHECK-LABEL: @simplify_phi_common_value_op0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ISNULL:%.*]] = icmp eq i8* [[PTR:%.*]], null
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; CHECK-NEXT: br i1 [[ISNULL]], label [[RETURN:%.*]], label [[ELSE:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[LB:%.*]] = load i32, i32* [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[LB]], 1
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; CHECK-NEXT: store i32 [[ADD]], i32* [[B]]
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: ret i8* [[PTR]]
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;
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entry:
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%isnull = icmp eq i8* %ptr, null
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br i1 %isnull, label %return, label %else
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else:
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%lb = load i32, i32* %b
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%add = add nsw i32 %lb, 1
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store i32 %add, i32* %b
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br label %return
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return:
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%r = phi i8* [ %ptr, %else ], [ null, %entry ]
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ret i8* %r
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}
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define i8* @simplify_phi_common_value_op1(i8* %ptr, i32* %b) {
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; CHECK-LABEL: @simplify_phi_common_value_op1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ISNULL:%.*]] = icmp eq i8* [[PTR:%.*]], null
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; CHECK-NEXT: br i1 [[ISNULL]], label [[RETURN:%.*]], label [[ELSE:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[LB:%.*]] = load i32, i32* [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add i32 [[LB]], 1
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; CHECK-NEXT: store i32 [[ADD]], i32* [[B]]
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: ret i8* [[PTR]]
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;
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entry:
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%isnull = icmp eq i8* %ptr, null
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br i1 %isnull, label %return, label %else
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else:
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%lb = load i32, i32* %b
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%add = add i32 %lb, 1
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store i32 %add, i32* %b
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br label %return
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return:
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%r = phi i8* [ null, %entry], [ %ptr, %else ]
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ret i8* %r
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}
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define i8 @simplify_phi_multiple_constants(i8 %x, i32* %b) {
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; CHECK-LABEL: @simplify_phi_multiple_constants(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[IS0:%.*]] = icmp eq i8 [[X:%.*]], 0
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; CHECK-NEXT: br i1 [[IS0]], label [[RETURN:%.*]], label [[ELSE1:%.*]]
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; CHECK: else1:
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; CHECK-NEXT: [[IS42:%.*]] = icmp eq i8 [[X]], 42
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; CHECK-NEXT: br i1 [[IS42]], label [[RETURN]], label [[ELSE2:%.*]]
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; CHECK: else2:
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; CHECK-NEXT: [[LB:%.*]] = load i32, i32* [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add i32 [[LB]], 1
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; CHECK-NEXT: store i32 [[ADD]], i32* [[B]]
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: ret i8 [[X]]
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;
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entry:
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%is0 = icmp eq i8 %x, 0
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br i1 %is0, label %return, label %else1
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else1:
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%is42 = icmp eq i8 %x, 42
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br i1 %is42, label %return, label %else2
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else2:
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%lb = load i32, i32* %b
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%add = add i32 %lb, 1
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store i32 %add, i32* %b
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br label %return
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return:
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%r = phi i8 [ 0, %entry], [ %x, %else2 ], [ 42, %else1 ]
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ret i8 %r
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}
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define i8* @simplify_phi_common_value_from_instruction(i8* %ptr_op, i32* %b, i32 %i) {
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; CHECK-LABEL: @simplify_phi_common_value_from_instruction(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PTR:%.*]] = getelementptr i8, i8* [[PTR_OP:%.*]], i32 [[I:%.*]]
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; CHECK-NEXT: [[ISNULL:%.*]] = icmp eq i8* [[PTR]], null
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; CHECK-NEXT: br i1 [[ISNULL]], label [[RETURN:%.*]], label [[ELSE:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[LB:%.*]] = load i32, i32* [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[LB]], 1
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; CHECK-NEXT: store i32 [[ADD]], i32* [[B]]
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: ret i8* [[PTR]]
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;
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entry:
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%ptr = getelementptr i8, i8* %ptr_op, i32 %i
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%isnull = icmp eq i8* %ptr, null
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br i1 %isnull, label %return, label %else
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else:
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%lb = load i32, i32* %b
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%add = add nsw i32 %lb, 1
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store i32 %add, i32* %b
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br label %return
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return:
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%r = phi i8* [ %ptr, %else ], [ null, %entry ]
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ret i8* %r
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}
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