324 lines
9.0 KiB
LLVM
324 lines
9.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -instcombine -S < %s | FileCheck %s
|
|
|
|
; Most basic case, fully identical PHI nodes
|
|
define void @test0(i32 %v0, i32 %v1, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @test0(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
|
|
; Fully identical PHI nodes, but order of operands differs
|
|
define void @test1(i32 %v0, i32 %v1, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I0:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v1, %b1 ], [ %v0, %b0 ]
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
|
|
; Different incoming values in second PHI
|
|
define void @negative_test2(i32 %v0, i32 %v1, i32 %v2, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @negative_test2(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I0:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0]], [[B0]] ], [ [[V2:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v2, %b1 ] ; from %b0 takes %v2 instead of %v1
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
define void @negative_test3(i32 %v0, i32 %v1, i32 %v2, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @negative_test3(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I0:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0]], [[B0]] ], [ [[V2:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v2, %b1 ], [ %v0, %b0 ] ; from %b0 takes %v2 instead of %v1
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
define void @negative_test4(i32 %v0, i32 %v1, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @negative_test4(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I0:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v1, %b1 ], [ %v0, %b0 ] ; incoming values are swapped
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
|
|
; Both PHI's are identical, but the first one has no uses, so ignore it.
|
|
define void @test5(i32 %v0, i32 %v1, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @test5(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ] ; unused
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
store i32 %i1, i32* %d1
|
|
ret void
|
|
}
|
|
; Second PHI has no uses
|
|
define void @test6(i32 %v0, i32 %v1, i1 %c, i32* %d0, i32* %d1) {
|
|
; CHECK-LABEL: @test6(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I0:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I0]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ] ; unused
|
|
store i32 %i0, i32* %d0
|
|
ret void
|
|
}
|
|
|
|
; Non-matching PHI node should be ignored without terminating CSE.
|
|
define void @test7(i32 %v0, i32 %v1, i16 %v2, i16 %v3, i1 %c, i32* %d0, i32* %d1, i16* %d2) {
|
|
; CHECK-LABEL: @test7(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[IBAD:%.*]] = phi i16 [ [[V2:%.*]], [[B0]] ], [ [[V3:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: store i16 [[IBAD]], i16* [[D2:%.*]], align 2
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%iBAD = phi i16 [ %v2, %b0 ], [ %v3, %b1 ]
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
store i16 %iBAD, i16* %d2
|
|
ret void
|
|
}
|
|
define void @test8(i32 %v0, i32 %v1, i16 %v2, i16 %v3, i1 %c, i32* %d0, i32* %d1, i16* %d2) {
|
|
; CHECK-LABEL: @test8(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[IBAD:%.*]] = phi i16 [ [[V2:%.*]], [[B0]] ], [ [[V3:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: store i16 [[IBAD]], i16* [[D2:%.*]], align 2
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%iBAD = phi i16 [ %v2, %b0 ], [ %v3, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
store i16 %iBAD, i16* %d2
|
|
ret void
|
|
}
|
|
define void @test9(i32 %v0, i32 %v1, i16 %v2, i16 %v3, i1 %c, i32* %d0, i32* %d1, i16* %d2) {
|
|
; CHECK-LABEL: @test9(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[B0:%.*]], label [[B1:%.*]]
|
|
; CHECK: b0:
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: b1:
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[I1:%.*]] = phi i32 [ [[V0:%.*]], [[B0]] ], [ [[V1:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: [[IBAD:%.*]] = phi i16 [ [[V2:%.*]], [[B0]] ], [ [[V3:%.*]], [[B1]] ]
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D0:%.*]], align 4
|
|
; CHECK-NEXT: store i32 [[I1]], i32* [[D1:%.*]], align 4
|
|
; CHECK-NEXT: store i16 [[IBAD]], i16* [[D2:%.*]], align 2
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
br i1 %c, label %b0, label %b1
|
|
|
|
b0:
|
|
br label %end
|
|
|
|
b1:
|
|
br label %end
|
|
|
|
end:
|
|
%i0 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%i1 = phi i32 [ %v0, %b0 ], [ %v1, %b1 ]
|
|
%iBAD = phi i16 [ %v2, %b0 ], [ %v3, %b1 ]
|
|
store i32 %i0, i32* %d0
|
|
store i32 %i1, i32* %d1
|
|
store i16 %iBAD, i16* %d2
|
|
ret void
|
|
}
|