derek.holloway
7502bf64a4
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63 lines
2.3 KiB
LLVM
63 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes="separate-const-offset-from-gep<lower-gep>" < %s | FileCheck %s
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;; Check that or operations, either with operands with no bits in common or that
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;; are disjoint are lowered into constant GEPs. Note that because this is a
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;; target-independent test, the GEP separator will lower the separated-off constant
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;; part to ptrtoint-based arithmetic.
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define void @testOrDoesntSplit(ptr %p) {
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; CHECK-LABEL: define void @testOrDoesntSplit(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[VAR:%.*]] = tail call i64 @foo()
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; CHECK-NEXT: [[OFF:%.*]] = or i64 [[VAR]], 10
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; CHECK-NEXT: [[Q:%.*]] = getelementptr i8, ptr [[P]], i64 [[OFF]]
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; CHECK-NEXT: store i8 0, ptr [[Q]], align 1
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; CHECK-NEXT: ret void
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;
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%var = tail call i64 @foo()
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%off = or i64 %var, 10
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%q = getelementptr i8, ptr %p, i64 %off
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store i8 0, ptr %q
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ret void
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}
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; COM: The check for `or disjoint` removed the old hasNoBitsInCommon()
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; COM: check, ensure that failing to annotate an or with disjoint makes
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; COM: the optimization fail.
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define void @testNoBitsInCommonOrDoesntSplit(ptr %p) {
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; CHECK-LABEL: define void @testNoBitsInCommonOrDoesntSplit(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[VAR:%.*]] = tail call i64 @foo()
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; CHECK-NEXT: [[VAR_HIGH:%.*]] = and i64 [[VAR]], -16
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; CHECK-NEXT: [[OFF:%.*]] = or i64 [[VAR_HIGH]], 10
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; CHECK-NEXT: [[Q:%.*]] = getelementptr i8, ptr [[P]], i64 [[OFF]]
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; CHECK-NEXT: store i8 0, ptr [[Q]], align 1
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; CHECK-NEXT: ret void
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;
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%var = tail call i64 @foo()
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%var.high = and i64 %var, -16
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%off = or i64 %var.high, 10
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%q = getelementptr i8, ptr %p, i64 %off
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store i8 0, ptr %q
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ret void
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}
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define void @testDisjointOrSplits(ptr %p) {
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; CHECK-LABEL: define void @testDisjointOrSplits(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[VAR:%.*]] = tail call i64 @foo()
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; CHECK-NEXT: [[UGLYGEP:%.*]] = getelementptr i8, ptr [[P]], i64 [[VAR]]
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; CHECK-NEXT: [[TMP4:%.*]] = getelementptr i8, ptr [[UGLYGEP]], i64 10
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; CHECK-NEXT: store i8 0, ptr [[TMP4]], align 1
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; CHECK-NEXT: ret void
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;
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%var = tail call i64 @foo()
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%off = or disjoint i64 %var, 10
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%q = getelementptr i8, ptr %p, i64 %off
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store i8 0, ptr %q
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ret void
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}
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declare i64 @foo()
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