derek.holloway
7502bf64a4
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34 lines
1.1 KiB
LLVM
34 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -passes=infer-alignment -S | FileCheck %s
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; Propagates alignment information across blocks
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; entry -> if.then: the original alignment in %load2 is better.
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; entry -> if.else: the alignment in %load3 is improved.
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; if.then -> if.else: the edge doesn't dominate if.else.
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define void @propagate_across_blocks(ptr %a, i1 %cond) {
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; CHECK-LABEL: define void @propagate_across_blocks(
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; CHECK-SAME: ptr [[A:%.*]], i1 [[COND:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[LOAD1:%.*]] = load i64, ptr [[A]], align 8
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; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: [[LOAD2:%.*]] = load i64, ptr [[A]], align 16
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; CHECK-NEXT: br label %[[IF_ELSE]]
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; CHECK: [[IF_ELSE]]:
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; CHECK-NEXT: [[LOAD3:%.*]] = load i64, ptr [[A]], align 8
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; CHECK-NEXT: ret void
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;
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entry:
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%load1 = load i64, ptr %a, align 8
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br i1 %cond, label %if.then, label %if.else
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if.then:
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%load2 = load i64, ptr %a, align 16
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br label %if.else
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if.else:
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%load3 = load i64, ptr %a, align 1
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ret void
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}
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