derek.holloway
7502bf64a4
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40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -S < %s -passes=instcombine | FileCheck %s
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target datalayout = "e-p1:16:16-p2:32:32-p3:64:64"
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@G1 = global i32 42, align 1
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@G2 = global i32 42
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@G3 = global [4 x i8] zeroinitializer, align 1
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@A1 = alias i32, getelementptr inbounds ([4 x i8], ptr @G3, i32 0, i32 2)
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define i64 @f1() {
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; This cannot be constant folded because G1 is underaligned.
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; CHECK-LABEL: define i64 @f1() {
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; CHECK-NEXT: [[AND:%.*]] = and i64 ptrtoint (ptr @G1 to i64), 1
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; CHECK-NEXT: ret i64 [[AND]]
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;
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%and = and i64 ptrtoint (ptr @G1 to i64), 1
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ret i64 %and
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}
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define i64 @f2() {
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; The preferred alignment for G2 allows this one to foled to zero.
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; CHECK-LABEL: define i64 @f2() {
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; CHECK-NEXT: ret i64 0
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;
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%and = and i64 ptrtoint (ptr @G2 to i64), 1
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ret i64 %and
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}
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define i64 @g1() {
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; This cannot be constant folded because A1 aliases G3 which is underalaigned.
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; CHECK-LABEL: define i64 @g1() {
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; CHECK-NEXT: [[AND:%.*]] = and i64 ptrtoint (ptr @A1 to i64), 1
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; CHECK-NEXT: ret i64 [[AND]]
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;
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%and = and i64 ptrtoint (ptr @A1 to i64), 1
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ret i64 %and
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}
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