73 lines
2.2 KiB
LLVM
73 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes=newgvn -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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; GVN should ignore the store to p[1] to see that the load from p[0] is
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; fully redundant.
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define void @yes(i1 %c, ptr %p, ptr %q) nounwind {
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; CHECK-LABEL: define void @yes
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; CHECK-SAME: (i1 [[C:%.*]], ptr [[P:%.*]], ptr [[Q:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, ptr [[P]], align 4
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; CHECK-NEXT: [[P1:%.*]] = getelementptr inbounds i32, ptr [[P]], i64 1
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; CHECK-NEXT: store i32 1, ptr [[P1]], align 4
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; CHECK-NEXT: br i1 [[C]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, ptr [[Q]], align 4
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; CHECK-NEXT: ret void
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; CHECK: if.else:
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 0, ptr %p
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%p1 = getelementptr inbounds i32, ptr %p, i64 1
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store i32 1, ptr %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, ptr %p
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store i32 %t, ptr %q
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ret void
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if.else:
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ret void
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}
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; GVN should ignore the store to p[1] to see that the first load from p[0] is
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; fully redundant. However, the second load is larger, so it's not a simple
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; redundancy.
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define void @watch_out_for_size_change(i1 %c, ptr %p, ptr %q) nounwind {
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; CHECK-LABEL: define void @watch_out_for_size_change
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; CHECK-SAME: (i1 [[C:%.*]], ptr [[P:%.*]], ptr [[Q:%.*]]) #[[ATTR0]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, ptr [[P]], align 4
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; CHECK-NEXT: [[P1:%.*]] = getelementptr inbounds i32, ptr [[P]], i64 1
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; CHECK-NEXT: store i32 1, ptr [[P1]], align 4
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; CHECK-NEXT: br i1 [[C]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, ptr [[Q]], align 4
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; CHECK-NEXT: ret void
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; CHECK: if.else:
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; CHECK-NEXT: [[T64:%.*]] = load i64, ptr [[P]], align 4
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; CHECK-NEXT: store i64 [[T64]], ptr [[Q]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 0, ptr %p
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%p1 = getelementptr inbounds i32, ptr %p, i64 1
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store i32 1, ptr %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, ptr %p
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store i32 %t, ptr %q
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ret void
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if.else:
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%t64 = load i64, ptr %p
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store i64 %t64, ptr %q
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ret void
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}
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