derek.holloway
7502bf64a4
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67 lines
2.4 KiB
LLVM
67 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
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; RUN: opt -passes="ipsccp<func-spec>" -funcspec-min-function-size=1 \
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; RUN: -funcspec-for-literal-constant=true \
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; RUN: -funcspec-min-codesize-savings=50 \
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; RUN: -funcspec-min-latency-savings=0 \
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; RUN: -S < %s | FileCheck %s
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; Verify that we are able to estimate the codesize savings arising from a branch
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; based on a binary operator, where one operand is already found constant by
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; IPSCCP.
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define i32 @main(i1 %flag) {
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%notspec = call i32 @test(i1 %flag, i1 false)
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%spec = call i32 @test(i1 false, i1 false)
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%sum = add i32 %notspec, %spec
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ret i32 %sum
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}
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define internal i32 @test(i1 %argflag, i1 %constflag) {
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entry:
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%cond = or i1 %argflag, %constflag
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br i1 %cond, label %if.then, label %if.end
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if.then:
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call void @do_something()
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call void @do_something()
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call void @do_something()
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call void @do_something()
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br label %if.end
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if.end:
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%res = phi i32 [ 0, %entry ], [ 1, %if.then]
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ret i32 %res
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}
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declare void @do_something()
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; CHECK-LABEL: define range(i32 0, 2) i32 @main(
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; CHECK-SAME: i1 [[FLAG:%.*]]) {
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; CHECK-NEXT: [[NOTSPEC:%.*]] = call i32 @test(i1 [[FLAG]], i1 false)
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; CHECK-NEXT: [[SPEC:%.*]] = call i32 @test.specialized.1(i1 false, i1 false)
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; CHECK-NEXT: [[SUM:%.*]] = add nuw nsw i32 [[NOTSPEC]], 0
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; CHECK-NEXT: ret i32 [[SUM]]
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;
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;
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; CHECK-LABEL: define internal range(i32 0, 2) i32 @test(
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; CHECK-SAME: i1 [[ARGFLAG:%.*]], i1 [[CONSTFLAG:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[COND:%.*]] = or i1 [[ARGFLAG]], false
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; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: call void @do_something()
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; CHECK-NEXT: call void @do_something()
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; CHECK-NEXT: call void @do_something()
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; CHECK-NEXT: call void @do_something()
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; CHECK-NEXT: br label %[[IF_END]]
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; CHECK: [[IF_END]]:
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; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ 1, %[[IF_THEN]] ]
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; CHECK-NEXT: ret i32 [[RES]]
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;
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;
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; CHECK-LABEL: define internal i32 @test.specialized.1(
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; CHECK-SAME: i1 [[ARGFLAG:%.*]], i1 [[CONSTFLAG:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br label %[[IF_END:.*]]
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; CHECK: [[IF_END]]:
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; CHECK-NEXT: ret i32 poison
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;
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