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[ValueTracking] Support assume in entry block without DT #109264

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Merged
merged 1 commit into from
Sep 19, 2024
Merged

[ValueTracking] Support assume in entry block without DT #109264

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3 changes: 2 additions & 1 deletion llvm/lib/Analysis/ValueTracking.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -528,7 +528,8 @@ bool llvm::isValidAssumeForContext(const Instruction *Inv,
if (DT) {
if (DT->dominates(Inv, CxtI))
return true;
} else if (Inv->getParent() == CxtI->getParent()->getSinglePredecessor()) {
} else if (Inv->getParent() == CxtI->getParent()->getSinglePredecessor() ||
Inv->getParent()->isEntryBlock()) {
// We don't have a DT, but this trivially dominates.
return true;
}
Expand Down
42 changes: 18 additions & 24 deletions llvm/test/Transforms/Util/assume-builder.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -567,15 +567,13 @@ define dso_local i32 @_Z6squarePi(ptr %P, ptr %P1, i1 %cond) {
; BASIC-NEXT: store i32 0, ptr [[P1]], align 4
; BASIC-NEXT: br i1 [[COND]], label [[C:%.*]], label [[B]]
; BASIC: B:
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 8) ]
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
; BASIC-NEXT: store i32 0, ptr [[P]], align 8
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 8) ]
; BASIC-NEXT: store i32 0, ptr [[P1]], align 8
; BASIC-NEXT: br label [[C]]
; BASIC: C:
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 32) ]
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
; BASIC-NEXT: store i32 0, ptr [[P]], align 32
; BASIC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 4) ]
; BASIC-NEXT: store i32 0, ptr [[P1]], align 4
; BASIC-NEXT: ret i32 0
;
Expand All @@ -593,15 +591,13 @@ define dso_local i32 @_Z6squarePi(ptr %P, ptr %P1, i1 %cond) {
; ALL-NEXT: store i32 0, ptr [[P1]], align 4
; ALL-NEXT: br i1 [[COND]], label [[C:%.*]], label [[B]]
; ALL: B:
; ALL-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 8) ]
; ALL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
; ALL-NEXT: store i32 0, ptr [[P]], align 8
; ALL-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 8) ]
; ALL-NEXT: store i32 0, ptr [[P1]], align 8
; ALL-NEXT: br label [[C]]
; ALL: C:
; ALL-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 32) ]
; ALL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
; ALL-NEXT: store i32 0, ptr [[P]], align 32
; ALL-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 4) ]
; ALL-NEXT: store i32 0, ptr [[P1]], align 4
; ALL-NEXT: ret i32 0
;
Expand All @@ -619,15 +615,13 @@ define dso_local i32 @_Z6squarePi(ptr %P, ptr %P1, i1 %cond) {
; WITH-AC-NEXT: store i32 0, ptr [[P1]], align 4
; WITH-AC-NEXT: br i1 [[COND]], label [[C:%.*]], label [[B]]
; WITH-AC: B:
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 8) ]
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
; WITH-AC-NEXT: store i32 0, ptr [[P]], align 8
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 8) ]
; WITH-AC-NEXT: store i32 0, ptr [[P1]], align 8
; WITH-AC-NEXT: br label [[C]]
; WITH-AC: C:
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P]], i64 4), "nonnull"(ptr [[P]]), "align"(ptr [[P]], i64 32) ]
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
; WITH-AC-NEXT: store i32 0, ptr [[P]], align 32
; WITH-AC-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[P1]], i64 4), "nonnull"(ptr [[P1]]), "align"(ptr [[P1]], i64 4) ]
; WITH-AC-NEXT: store i32 0, ptr [[P1]], align 4
; WITH-AC-NEXT: ret i32 0
;
Expand Down Expand Up @@ -667,12 +661,12 @@ define dso_local i32 @_Z6squarePi(ptr %P, ptr %P1, i1 %cond) {
; FULL-SIMPLIFY-NEXT: store i32 0, ptr [[P1]], align 4
; FULL-SIMPLIFY-NEXT: br i1 [[COND]], label [[C:%.*]], label [[B]]
; FULL-SIMPLIFY: B:
; FULL-SIMPLIFY-NEXT: call void @llvm.assume(i1 true) [ "ignore"(ptr undef, i64 4), "ignore"(ptr undef), "align"(ptr [[P]], i64 8) ]
; FULL-SIMPLIFY-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 8) ]
; FULL-SIMPLIFY-NEXT: store i32 0, ptr [[P]], align 8
; FULL-SIMPLIFY-NEXT: store i32 0, ptr [[P1]], align 8
; FULL-SIMPLIFY-NEXT: br label [[C]]
; FULL-SIMPLIFY: C:
; FULL-SIMPLIFY-NEXT: call void @llvm.assume(i1 true) [ "ignore"(ptr undef, i64 4), "ignore"(ptr undef), "align"(ptr [[P]], i64 32) ]
; FULL-SIMPLIFY-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
; FULL-SIMPLIFY-NEXT: store i32 0, ptr [[P]], align 32
; FULL-SIMPLIFY-NEXT: store i32 0, ptr [[P1]], align 4
; FULL-SIMPLIFY-NEXT: ret i32 0
Expand Down Expand Up @@ -830,10 +824,10 @@ define dso_local i32 @terminator(ptr %P) personality ptr @__gxx_personality_v0 {
; BASIC-SAME: (ptr [[P:%.*]]) personality ptr @__gxx_personality_v0 {
; BASIC-NEXT: bb:
; BASIC-NEXT: invoke void @may_throwv2(ptr nonnull [[P]])
; BASIC-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; BASIC-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; BASIC: Catch:
; BASIC-NEXT: [[V:%.*]] = landingpad { ptr, i32 }
; BASIC-NEXT: catch ptr null
; BASIC-NEXT: catch ptr null
; BASIC-NEXT: br label [[EXIT]]
; BASIC: Exit:
; BASIC-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB:%.*]] ], [ 0, [[CATCH]] ]
Expand All @@ -843,10 +837,10 @@ define dso_local i32 @terminator(ptr %P) personality ptr @__gxx_personality_v0 {
; ALL-SAME: (ptr [[P:%.*]]) personality ptr @__gxx_personality_v0 {
; ALL-NEXT: bb:
; ALL-NEXT: invoke void @may_throwv2(ptr nonnull [[P]])
; ALL-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; ALL-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; ALL: Catch:
; ALL-NEXT: [[V:%.*]] = landingpad { ptr, i32 }
; ALL-NEXT: catch ptr null
; ALL-NEXT: catch ptr null
; ALL-NEXT: br label [[EXIT]]
; ALL: Exit:
; ALL-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB:%.*]] ], [ 0, [[CATCH]] ]
Expand All @@ -856,10 +850,10 @@ define dso_local i32 @terminator(ptr %P) personality ptr @__gxx_personality_v0 {
; WITH-AC-SAME: (ptr [[P:%.*]]) personality ptr @__gxx_personality_v0 {
; WITH-AC-NEXT: bb:
; WITH-AC-NEXT: invoke void @may_throwv2(ptr nonnull [[P]])
; WITH-AC-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; WITH-AC-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; WITH-AC: Catch:
; WITH-AC-NEXT: [[V:%.*]] = landingpad { ptr, i32 }
; WITH-AC-NEXT: catch ptr null
; WITH-AC-NEXT: catch ptr null
; WITH-AC-NEXT: br label [[EXIT]]
; WITH-AC: Exit:
; WITH-AC-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB:%.*]] ], [ 0, [[CATCH]] ]
Expand All @@ -869,10 +863,10 @@ define dso_local i32 @terminator(ptr %P) personality ptr @__gxx_personality_v0 {
; CROSS-BLOCK-SAME: (ptr [[P:%.*]]) personality ptr @__gxx_personality_v0 {
; CROSS-BLOCK-NEXT: bb:
; CROSS-BLOCK-NEXT: invoke void @may_throwv2(ptr nonnull [[P]])
; CROSS-BLOCK-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; CROSS-BLOCK-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; CROSS-BLOCK: Catch:
; CROSS-BLOCK-NEXT: [[V:%.*]] = landingpad { ptr, i32 }
; CROSS-BLOCK-NEXT: catch ptr null
; CROSS-BLOCK-NEXT: catch ptr null
; CROSS-BLOCK-NEXT: br label [[EXIT]]
; CROSS-BLOCK: Exit:
; CROSS-BLOCK-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB:%.*]] ], [ 0, [[CATCH]] ]
Expand All @@ -882,10 +876,10 @@ define dso_local i32 @terminator(ptr %P) personality ptr @__gxx_personality_v0 {
; FULL-SIMPLIFY-SAME: (ptr [[P:%.*]]) personality ptr @__gxx_personality_v0 {
; FULL-SIMPLIFY-NEXT: bb:
; FULL-SIMPLIFY-NEXT: invoke void @may_throwv2(ptr nonnull [[P]])
; FULL-SIMPLIFY-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; FULL-SIMPLIFY-NEXT: to label [[EXIT:%.*]] unwind label [[CATCH:%.*]]
; FULL-SIMPLIFY: Catch:
; FULL-SIMPLIFY-NEXT: [[V:%.*]] = landingpad { ptr, i32 }
; FULL-SIMPLIFY-NEXT: catch ptr null
; FULL-SIMPLIFY-NEXT: catch ptr null
; FULL-SIMPLIFY-NEXT: br label [[EXIT]]
; FULL-SIMPLIFY: Exit:
; FULL-SIMPLIFY-NEXT: [[DOT0:%.*]] = phi i32 [ 1, [[BB:%.*]] ], [ 0, [[CATCH]] ]
Expand Down
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