derek.holloway
7502bf64a4
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101 lines
3.1 KiB
LLVM
101 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -passes=gvn -S < %s | FileCheck %s
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@y = external global i32
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@z = external global i32
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; Function Attrs: nounwind ssp uwtable
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define void @foo(i32 %x) {
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; CHECK-LABEL: define void @foo(
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; CHECK-SAME: i32 [[X:%.*]]) {
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; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr @y, align 4
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; CHECK-NEXT: br i1 false, label %[[IF_THEN:.*]], label %[[ENTRY_IF_END_CRIT_EDGE:.*]]
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; CHECK: [[ENTRY_IF_END_CRIT_EDGE]]:
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; CHECK-NEXT: br label %[[IF_END:.*]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X]], 3
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; CHECK-NEXT: store i32 [[ADD]], ptr @y, align 4
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; CHECK-NEXT: br label %[[IF_END]]
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; CHECK: [[IF_END]]:
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; CHECK-NEXT: tail call void @bar(i32 [[DOTPRE]])
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; CHECK-NEXT: ret void
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;
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%t = sub i32 %x, %x
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%.pre = load i32, ptr @y, align 4
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%cmp = icmp sgt i32 %t, 2
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br i1 %cmp, label %if.then, label %entry.if.end_crit_edge
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entry.if.end_crit_edge: ; preds = %entry
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br label %if.end
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if.then: ; preds = %entry
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%add = add nsw i32 %x, 3
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store i32 %add, ptr @y, align 4
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br label %if.end
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if.end: ; preds = %entry.if.end_crit_edge, %if.then
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%1 = phi i32 [ %.pre, %entry.if.end_crit_edge ], [ %add, %if.then ]
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tail call void @bar(i32 %1)
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ret void
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}
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define void @foo2(i32 %x) {
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; CHECK-LABEL: define void @foo2(
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; CHECK-SAME: i32 [[X:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr @y, align 4
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; CHECK-NEXT: br i1 false, label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X]], 3
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; CHECK-NEXT: store i32 [[ADD]], ptr @y, align 4
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; CHECK-NEXT: br label %[[IF_END:.*]]
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; CHECK: [[IF_ELSE]]:
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; CHECK-NEXT: store i32 1, ptr @z, align 4
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; CHECK-NEXT: br label %[[IF_END]]
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; CHECK: [[IF_END]]:
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; CHECK-NEXT: tail call void @bar(i32 [[DOTPRE]])
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; CHECK-NEXT: ret void
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;
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entry:
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%t = sub i32 %x, %x
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%.pre = load i32, ptr @y, align 4
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%cmp = icmp sgt i32 %t, 2
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br i1 %cmp, label %if.then, label %if.else
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if.then: ; preds = %entry
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%add = add nsw i32 %x, 3
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store i32 %add, ptr @y, align 4
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br label %if.end
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if.else: ; preds = %entry
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store i32 1, ptr @z, align 4
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%0 = phi i32 [ %.pre, %if.else ], [ %add, %if.then ]
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tail call void @bar(i32 %0)
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ret void
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}
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declare void @bar(i32)
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define void @indirectbr_could_not_split() {
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; CHECK-LABEL: define void @indirectbr_could_not_split() {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 false, label %[[IBR:.*]], label %[[EXIT:.*]]
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; CHECK: [[IBR]]:
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; CHECK-NEXT: indirectbr ptr null, [label %[[EXIT]], label %exit]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 false, label %ibr, label %exit
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ibr:
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indirectbr ptr null, [label %exit, label %exit]
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exit:
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ret void
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}
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