+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basic-aa -gvn -S | FileCheck %s
@a = external global i32 ; <i32*> [#uses=7]
-; CHECK-LABEL: @test1(
define i32 @test1() nounwind {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
+; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 4
+; CHECK-NEXT: br i1 [[TMP1]], label [[BB:%.*]], label [[BB1:%.*]]
+; CHECK: bb:
+; CHECK-NEXT: br label [[BB8:%.*]]
+; CHECK: bb1:
+; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[TMP0]], 5
+; CHECK-NEXT: br i1 [[TMP2]], label [[BB2:%.*]], label [[BB3:%.*]]
+; CHECK: bb2:
+; CHECK-NEXT: br label [[BB8]]
+; CHECK: bb3:
+; CHECK-NEXT: br i1 false, label [[BB4:%.*]], label [[BB5:%.*]]
+; CHECK: bb4:
+; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* @a, align 4
+; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[TMP3]], 5
+; CHECK-NEXT: br label [[BB8]]
+; CHECK: bb5:
+; CHECK-NEXT: br i1 false, label [[BB6:%.*]], label [[BB7:%.*]]
+; CHECK: bb6:
+; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* @a, align 4
+; CHECK-NEXT: [[TMP6:%.*]] = add i32 [[TMP5]], 4
+; CHECK-NEXT: br label [[BB8]]
+; CHECK: bb7:
+; CHECK-NEXT: br label [[BB8]]
+; CHECK: bb8:
+; CHECK-NEXT: [[DOT0:%.*]] = phi i32 [ [[TMP0]], [[BB7]] ], [ undef, [[BB6]] ], [ undef, [[BB4]] ], [ 4, [[BB2]] ], [ 5, [[BB]] ]
+; CHECK-NEXT: ret i32 [[DOT0]]
+;
entry:
- %0 = load i32, i32* @a, align 4
- %1 = icmp eq i32 %0, 4
- br i1 %1, label %bb, label %bb1
+ %0 = load i32, i32* @a, align 4
+ %1 = icmp eq i32 %0, 4
+ br i1 %1, label %bb, label %bb1
bb: ; preds = %entry
- br label %bb8
+ br label %bb8
bb1: ; preds = %entry
- %2 = load i32, i32* @a, align 4
- %3 = icmp eq i32 %2, 5
- br i1 %3, label %bb2, label %bb3
+ %2 = load i32, i32* @a, align 4
+ %3 = icmp eq i32 %2, 5
+ br i1 %3, label %bb2, label %bb3
bb2: ; preds = %bb1
- br label %bb8
+ br label %bb8
bb3: ; preds = %bb1
- %4 = load i32, i32* @a, align 4
- %5 = icmp eq i32 %4, 4
-; CHECK: br i1 false, label %bb4, label %bb5
- br i1 %5, label %bb4, label %bb5
+ %4 = load i32, i32* @a, align 4
+ %5 = icmp eq i32 %4, 4
+ br i1 %5, label %bb4, label %bb5
bb4: ; preds = %bb3
- %6 = load i32, i32* @a, align 4
- %7 = add i32 %6, 5
- br label %bb8
+ %6 = load i32, i32* @a, align 4
+ %7 = add i32 %6, 5
+ br label %bb8
bb5: ; preds = %bb3
- %8 = load i32, i32* @a, align 4
- %9 = icmp eq i32 %8, 5
-; CHECK: br i1 false, label %bb6, label %bb7
- br i1 %9, label %bb6, label %bb7
+ %8 = load i32, i32* @a, align 4
+ %9 = icmp eq i32 %8, 5
+ br i1 %9, label %bb6, label %bb7
bb6: ; preds = %bb5
- %10 = load i32, i32* @a, align 4
- %11 = add i32 %10, 4
- br label %bb8
+ %10 = load i32, i32* @a, align 4
+ %11 = add i32 %10, 4
+ br label %bb8
bb7: ; preds = %bb5
- %12 = load i32, i32* @a, align 4
- br label %bb8
+ %12 = load i32, i32* @a, align 4
+ br label %bb8
bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb
- %.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ]
- br label %return
+ %.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ]
+ br label %return
return: ; preds = %bb8
- ret i32 %.0
+ ret i32 %.0
}
declare void @foo(i1)
declare void @bar(i32)
-; CHECK-LABEL: @test3(
define void @test3(i32 %x, i32 %y) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT: [[XZ:%.*]] = icmp eq i32 [[X:%.*]], 0
+; CHECK-NEXT: [[YZ:%.*]] = icmp eq i32 [[Y:%.*]], 0
+; CHECK-NEXT: [[Z:%.*]] = and i1 [[XZ]], [[YZ]]
+; CHECK-NEXT: br i1 [[Z]], label [[BOTH_ZERO:%.*]], label [[NOPE:%.*]]
+; CHECK: both_zero:
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: ret void
+; CHECK: nope:
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: ret void
+;
%xz = icmp eq i32 %x, 0
%yz = icmp eq i32 %y, 0
%z = and i1 %xz, %yz
br i1 %z, label %both_zero, label %nope
both_zero:
call void @foo(i1 %xz)
-; CHECK: call void @foo(i1 true)
call void @foo(i1 %yz)
-; CHECK: call void @foo(i1 true)
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 0)
call void @bar(i32 %y)
-; CHECK: call void @bar(i32 0)
ret void
nope:
call void @foo(i1 %z)
-; CHECK: call void @foo(i1 false)
ret void
}
-; CHECK-LABEL: @test3_select(
define void @test3_select(i32 %x, i32 %y) {
+; CHECK-LABEL: @test3_select(
+; CHECK-NEXT: [[XZ:%.*]] = icmp eq i32 [[X:%.*]], 0
+; CHECK-NEXT: [[YZ:%.*]] = icmp eq i32 [[Y:%.*]], 0
+; CHECK-NEXT: [[Z:%.*]] = select i1 [[XZ]], i1 [[YZ]], i1 false
+; CHECK-NEXT: br i1 [[Z]], label [[BOTH_ZERO:%.*]], label [[NOPE:%.*]]
+; CHECK: both_zero:
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: ret void
+; CHECK: nope:
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: ret void
+;
%xz = icmp eq i32 %x, 0
%yz = icmp eq i32 %y, 0
%z = select i1 %xz, i1 %yz, i1 false
br i1 %z, label %both_zero, label %nope
both_zero:
call void @foo(i1 %xz)
-; CHECK: call void @foo(i1 true)
call void @foo(i1 %yz)
-; CHECK: call void @foo(i1 true)
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 0)
call void @bar(i32 %y)
-; CHECK: call void @bar(i32 0)
ret void
nope:
call void @foo(i1 %z)
-; CHECK: call void @foo(i1 false)
ret void
}
-; CHECK-LABEL: @test3_or(
define void @test3_or(i32 %x, i32 %y) {
+; CHECK-LABEL: @test3_or(
+; CHECK-NEXT: [[XZ:%.*]] = icmp ne i32 [[X:%.*]], 0
+; CHECK-NEXT: [[YZ:%.*]] = icmp ne i32 [[Y:%.*]], 0
+; CHECK-NEXT: [[Z:%.*]] = or i1 [[XZ]], [[YZ]]
+; CHECK-NEXT: br i1 [[Z]], label [[NOPE:%.*]], label [[BOTH_ZERO:%.*]]
+; CHECK: both_zero:
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: ret void
+; CHECK: nope:
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: ret void
+;
%xz = icmp ne i32 %x, 0
%yz = icmp ne i32 %y, 0
%z = or i1 %xz, %yz
br i1 %z, label %nope, label %both_zero
both_zero:
call void @foo(i1 %xz)
-; CHECK: call void @foo(i1 false)
call void @foo(i1 %yz)
-; CHECK: call void @foo(i1 false)
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 0)
call void @bar(i32 %y)
-; CHECK: call void @bar(i32 0)
ret void
nope:
call void @foo(i1 %z)
-; CHECK: call void @foo(i1 true)
ret void
}
-; CHECK-LABEL: @test3_or_select(
define void @test3_or_select(i32 %x, i32 %y) {
+; CHECK-LABEL: @test3_or_select(
+; CHECK-NEXT: [[XZ:%.*]] = icmp ne i32 [[X:%.*]], 0
+; CHECK-NEXT: [[YZ:%.*]] = icmp ne i32 [[Y:%.*]], 0
+; CHECK-NEXT: [[Z:%.*]] = select i1 [[XZ]], i1 true, i1 [[YZ]]
+; CHECK-NEXT: br i1 [[Z]], label [[NOPE:%.*]], label [[BOTH_ZERO:%.*]]
+; CHECK: both_zero:
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: call void @foo(i1 false)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: call void @bar(i32 0)
+; CHECK-NEXT: ret void
+; CHECK: nope:
+; CHECK-NEXT: call void @foo(i1 true)
+; CHECK-NEXT: ret void
+;
%xz = icmp ne i32 %x, 0
%yz = icmp ne i32 %y, 0
%z = select i1 %xz, i1 true, i1 %yz
br i1 %z, label %nope, label %both_zero
both_zero:
call void @foo(i1 %xz)
-; CHECK: call void @foo(i1 false)
call void @foo(i1 %yz)
-; CHECK: call void @foo(i1 false)
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 0)
call void @bar(i32 %y)
-; CHECK: call void @bar(i32 0)
ret void
nope:
call void @foo(i1 %z)
-; CHECK: call void @foo(i1 true)
ret void
}
-; CHECK-LABEL: @test4(
define void @test4(i1 %b, i32 %x) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT: br i1 [[B:%.*]], label [[SW:%.*]], label [[CASE3:%.*]]
+; CHECK: sw:
+; CHECK-NEXT: switch i32 [[X:%.*]], label [[DEFAULT:%.*]] [
+; CHECK-NEXT: i32 0, label [[CASE0:%.*]]
+; CHECK-NEXT: i32 1, label [[CASE1:%.*]]
+; CHECK-NEXT: i32 2, label [[CASE0]]
+; CHECK-NEXT: i32 3, label [[CASE3]]
+; CHECK-NEXT: i32 4, label [[DEFAULT]]
+; CHECK-NEXT: ]
+; CHECK: default:
+; CHECK-NEXT: call void @bar(i32 [[X]])
+; CHECK-NEXT: ret void
+; CHECK: case0:
+; CHECK-NEXT: call void @bar(i32 [[X]])
+; CHECK-NEXT: ret void
+; CHECK: case1:
+; CHECK-NEXT: call void @bar(i32 1)
+; CHECK-NEXT: ret void
+; CHECK: case3:
+; CHECK-NEXT: call void @bar(i32 [[X]])
+; CHECK-NEXT: ret void
+;
br i1 %b, label %sw, label %case3
sw:
switch i32 %x, label %default [
- i32 0, label %case0
- i32 1, label %case1
- i32 2, label %case0
- i32 3, label %case3
- i32 4, label %default
+ i32 0, label %case0
+ i32 1, label %case1
+ i32 2, label %case0
+ i32 3, label %case3
+ i32 4, label %default
]
default:
-; CHECK: default:
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 %x)
ret void
case0:
-; CHECK: case0:
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 %x)
ret void
case1:
-; CHECK: case1:
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 1)
ret void
case3:
-; CHECK: case3:
call void @bar(i32 %x)
-; CHECK: call void @bar(i32 %x)
ret void
}
-; CHECK-LABEL: @test5(
define i1 @test5(i32 %x, i32 %y) {
+; CHECK-LABEL: @test5(
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp = icmp eq i32 %x, %y
br i1 %cmp, label %same, label %different
same:
%cmp2 = icmp ne i32 %x, %y
-; CHECK: ret i1 false
ret i1 %cmp2
different:
%cmp3 = icmp eq i32 %x, %y
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test6(
define i1 @test6(i32 %x, i32 %y) {
+; CHECK-LABEL: @test6(
+; CHECK-NEXT: [[CMP2:%.*]] = icmp ne i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], [[Y]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp2 = icmp ne i32 %x, %y
%cmp = icmp eq i32 %x, %y
%cmp3 = icmp eq i32 %x, %y
br i1 %cmp, label %same, label %different
same:
-; CHECK: ret i1 false
ret i1 %cmp2
different:
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test6_fp(
define i1 @test6_fp(float %x, float %y) {
+; CHECK-LABEL: @test6_fp(
+; CHECK-NEXT: [[CMP2:%.*]] = fcmp une float [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X]], [[Y]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp2 = fcmp une float %x, %y
%cmp = fcmp oeq float %x, %y
%cmp3 = fcmp oeq float %x, %y
br i1 %cmp, label %same, label %different
same:
-; CHECK: ret i1 false
ret i1 %cmp2
different:
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test7(
define i1 @test7(i32 %x, i32 %y) {
+; CHECK-LABEL: @test7(
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp = icmp sgt i32 %x, %y
br i1 %cmp, label %same, label %different
same:
%cmp2 = icmp sle i32 %x, %y
-; CHECK: ret i1 false
ret i1 %cmp2
different:
%cmp3 = icmp sgt i32 %x, %y
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test7_fp(
define i1 @test7_fp(float %x, float %y) {
+; CHECK-LABEL: @test7_fp(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp = fcmp ogt float %x, %y
br i1 %cmp, label %same, label %different
same:
%cmp2 = fcmp ule float %x, %y
-; CHECK: ret i1 false
ret i1 %cmp2
different:
%cmp3 = fcmp ogt float %x, %y
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test8(
define i1 @test8(i32 %x, i32 %y) {
+; CHECK-LABEL: @test8(
+; CHECK-NEXT: [[CMP2:%.*]] = icmp sle i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X]], [[Y]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp2 = icmp sle i32 %x, %y
%cmp = icmp sgt i32 %x, %y
%cmp3 = icmp sgt i32 %x, %y
br i1 %cmp, label %same, label %different
same:
-; CHECK: ret i1 false
ret i1 %cmp2
different:
-; CHECK: ret i1 false
ret i1 %cmp3
}
-; CHECK-LABEL: @test8_fp(
define i1 @test8_fp(float %x, float %y) {
+; CHECK-LABEL: @test8_fp(
+; CHECK-NEXT: [[CMP2:%.*]] = fcmp ule float [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt float [[X]], [[Y]]
+; CHECK-NEXT: br i1 [[CMP]], label [[SAME:%.*]], label [[DIFFERENT:%.*]]
+; CHECK: same:
+; CHECK-NEXT: ret i1 false
+; CHECK: different:
+; CHECK-NEXT: ret i1 false
+;
%cmp2 = fcmp ule float %x, %y
%cmp = fcmp ogt float %x, %y
%cmp3 = fcmp ogt float %x, %y
br i1 %cmp, label %same, label %different
same:
-; CHECK: ret i1 false
ret i1 %cmp2
different:
-; CHECK: ret i1 false
ret i1 %cmp3
}
; PR1768
-; CHECK-LABEL: @test9(
define i32 @test9(i32 %i, i32 %j) {
+; CHECK-LABEL: @test9(
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I:%.*]], [[J:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[RET:%.*]]
+; CHECK: cond_true:
+; CHECK-NEXT: ret i32 0
+; CHECK: ret:
+; CHECK-NEXT: ret i32 5
+;
%cmp = icmp eq i32 %i, %j
br i1 %cmp, label %cond_true, label %ret
cond_true:
%diff = sub i32 %i, %j
ret i32 %diff
-; CHECK: ret i32 0
ret:
ret i32 5
-; CHECK: ret i32 5
}
; PR1768
-; CHECK-LABEL: @test10(
define i32 @test10(i32 %j, i32 %i) {
+; CHECK-LABEL: @test10(
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I:%.*]], [[J:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[RET:%.*]]
+; CHECK: cond_true:
+; CHECK-NEXT: ret i32 0
+; CHECK: ret:
+; CHECK-NEXT: ret i32 5
+;
%cmp = icmp eq i32 %i, %j
br i1 %cmp, label %cond_true, label %ret
cond_true:
%diff = sub i32 %i, %j
ret i32 %diff
-; CHECK: ret i32 0
ret:
ret i32 5
-; CHECK: ret i32 5
}
declare i32 @yogibar()
-; CHECK-LABEL: @test11(
define i32 @test11(i32 %x) {
+; CHECK-LABEL: @test11(
+; CHECK-NEXT: [[V0:%.*]] = call i32 @yogibar()
+; CHECK-NEXT: [[V1:%.*]] = call i32 @yogibar()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[V0]], [[V1]]
+; CHECK-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[NEXT:%.*]]
+; CHECK: cond_true:
+; CHECK-NEXT: ret i32 [[V0]]
+; CHECK: next:
+; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[X:%.*]], [[V0]]
+; CHECK-NEXT: br i1 [[CMP2]], label [[COND_TRUE2:%.*]], label [[NEXT2:%.*]]
+; CHECK: cond_true2:
+; CHECK-NEXT: ret i32 [[X]]
+; CHECK: next2:
+; CHECK-NEXT: ret i32 0
+;
%v0 = call i32 @yogibar()
%v1 = call i32 @yogibar()
%cmp = icmp eq i32 %v0, %v1
cond_true:
ret i32 %v1
-; CHECK: ret i32 %v0
next:
%cmp2 = icmp eq i32 %x, %v0
cond_true2:
ret i32 %v0
-; CHECK: ret i32 %x
next2:
ret i32 0
}
-; CHECK-LABEL: @test12(
define i32 @test12(i32 %x) {
+; CHECK-LABEL: @test12(
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], 0
+; CHECK-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
+; CHECK: cond_true:
+; CHECK-NEXT: br label [[RET:%.*]]
+; CHECK: cond_false:
+; CHECK-NEXT: br label [[RET]]
+; CHECK: ret:
+; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, [[COND_TRUE]] ], [ [[X]], [[COND_FALSE]] ]
+; CHECK-NEXT: ret i32 [[RES]]
+;
%cmp = icmp eq i32 %x, 0
br i1 %cmp, label %cond_true, label %cond_false
ret:
%res = phi i32 [ %x, %cond_true ], [ %x, %cond_false ]
-; CHECK: %res = phi i32 [ 0, %cond_true ], [ %x, %cond_false ]
ret i32 %res
}
; On the path from entry->if->end we know that ptr1==ptr2, so we can determine
; that gep2 does not alias ptr1 on that path (as it would require that
; ptr2==ptr2+2), so we can perform PRE of the load.
-; CHECK-LABEL: @test13
define i32 @test13(i32* %ptr1, i32* %ptr2) {
-; CHECK-LABEL: entry:
+; CHECK-LABEL: @test13(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[GEP1:%.*]] = getelementptr i32, i32* [[PTR2:%.*]], i32 1
+; CHECK-NEXT: [[GEP2:%.*]] = getelementptr i32, i32* [[PTR2]], i32 2
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32* [[PTR1:%.*]], [[PTR2]]
+; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ENTRY_END_CRIT_EDGE:%.*]]
+; CHECK: entry.end_crit_edge:
+; CHECK-NEXT: [[VAL2_PRE:%.*]] = load i32, i32* [[GEP2]], align 4
+; CHECK-NEXT: br label [[END:%.*]]
+; CHECK: if:
+; CHECK-NEXT: [[VAL1:%.*]] = load i32, i32* [[GEP2]], align 4
+; CHECK-NEXT: br label [[END]]
+; CHECK: end:
+; CHECK-NEXT: [[VAL2:%.*]] = phi i32 [ [[VAL1]], [[IF]] ], [ [[VAL2_PRE]], [[ENTRY_END_CRIT_EDGE]] ]
+; CHECK-NEXT: [[PHI1:%.*]] = phi i32* [ [[PTR2]], [[IF]] ], [ [[GEP1]], [[ENTRY_END_CRIT_EDGE]] ]
+; CHECK-NEXT: [[PHI2:%.*]] = phi i32 [ [[VAL1]], [[IF]] ], [ 0, [[ENTRY_END_CRIT_EDGE]] ]
+; CHECK-NEXT: store i32 0, i32* [[PHI1]], align 4
+; CHECK-NEXT: [[RET:%.*]] = add i32 [[PHI2]], [[VAL2]]
+; CHECK-NEXT: ret i32 [[RET]]
+;
entry:
%gep1 = getelementptr i32, i32* %ptr2, i32 1
%gep2 = getelementptr i32, i32* %ptr2, i32 2
%cmp = icmp eq i32* %ptr1, %ptr2
br i1 %cmp, label %if, label %end
-; CHECK: [[CRIT_EDGE:.*]]:
-; CHECK: %[[PRE:.*]] = load i32, i32* %gep2, align 4
-; CHECK-LABEL: if:
if:
%val1 = load i32, i32* %gep2, align 4
br label %end
-; CHECK-LABEL: end:
-; CHECK: %val2 = phi i32 [ %val1, %if ], [ %[[PRE]], %[[CRIT_EDGE]] ]
-; CHECK-NOT: load
end:
%phi1 = phi i32* [ %ptr1, %if ], [ %gep1, %entry ]
%phi2 = phi i32 [ %val1, %if ], [ 0, %entry ]
ret i32 %ret
}
-; CHECK-LABEL: @test14
define void @test14(i32* %ptr1, i32* noalias %ptr2) {
+; CHECK-LABEL: @test14(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds i32, i32* [[PTR1:%.*]], i32 1
+; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i32, i32* [[PTR1]], i32 2
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: br i1 undef, label [[LOOP_IF1_CRIT_EDGE:%.*]], label [[THEN:%.*]]
+; CHECK: loop.if1_crit_edge:
+; CHECK-NEXT: [[VAL2_PRE:%.*]] = load i32, i32* [[GEP2]], align 4
+; CHECK-NEXT: br label [[IF1:%.*]]
+; CHECK: if1:
+; CHECK-NEXT: [[VAL2:%.*]] = phi i32 [ [[VAL2_PRE]], [[LOOP_IF1_CRIT_EDGE]] ], [ [[VAL3:%.*]], [[LOOP_END:%.*]] ]
+; CHECK-NEXT: store i32 [[VAL2]], i32* [[GEP2]], align 4
+; CHECK-NEXT: store i32 0, i32* [[GEP1]], align 4
+; CHECK-NEXT: br label [[THEN]]
+; CHECK: then:
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32* [[GEP2]], [[PTR2:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_END]], label [[IF2:%.*]]
+; CHECK: if2:
+; CHECK-NEXT: br label [[LOOP_END]]
+; CHECK: loop.end:
+; CHECK-NEXT: [[PHI3:%.*]] = phi i32* [ [[PTR2]], [[THEN]] ], [ [[PTR1]], [[IF2]] ]
+; CHECK-NEXT: [[VAL3]] = load i32, i32* [[GEP2]], align 4
+; CHECK-NEXT: store i32 [[VAL3]], i32* [[PHI3]], align 4
+; CHECK-NEXT: br i1 undef, label [[LOOP]], label [[IF1]]
+;
entry:
%gep1 = getelementptr inbounds i32, i32* %ptr1, i32 1
%gep2 = getelementptr inbounds i32, i32* %ptr1, i32 2
br label %loop
-; CHECK-LABEL: loop:
loop:
%phi1 = phi i32* [ %gep3, %loop.end ], [ %gep1, %entry ]
br i1 undef, label %if1, label %then
-; CHECK: [[CRIT_EDGE:.*]]:
-; CHECK: %[[PRE:.*]] = load i32, i32* %gep2, align 4
-; CHECK-LABEL: if1:
-; CHECK: %val2 = phi i32 [ %[[PRE]], %[[CRIT_EDGE]] ], [ %val3, %loop.end ]
-; CHECK-NOT: load
if1:
%val2 = load i32, i32* %gep2, align 4
store i32 %val2, i32* %gep2, align 4
store i32 0, i32* %phi1, align 4
br label %then
-; CHECK-LABEL: then:
then:
%cmp = icmp eq i32* %gep2, %ptr2
br i1 %cmp, label %loop.end, label %if2
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