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75 lines
2.5 KiB
LLVM
75 lines
2.5 KiB
LLVM
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; 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 block
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; which is found dead, where the block has a predecessor that was found dead 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 true)
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%spec = call i32 @test(i1 true, i1 true)
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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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br i1 %argflag, label %block1, label %block3
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block1:
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br i1 %constflag, label %end, label %block2
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block2:
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br label %block3
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block3:
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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 %end
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end:
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%res = phi i32 [ 0, %block1 ], [ 1, %block3]
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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 true)
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; CHECK-NEXT: [[SPEC:%.*]] = call i32 @test.specialized.1(i1 true, i1 true)
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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: br i1 [[ARGFLAG]], label %[[BLOCK1:.*]], label %[[BLOCK3:.*]]
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; CHECK: [[BLOCK1]]:
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; CHECK-NEXT: br label %[[END:.*]]
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; CHECK: [[BLOCK3]]:
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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 %[[END]]
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; CHECK: [[END]]:
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; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, %[[BLOCK1]] ], [ 1, %[[BLOCK3]] ]
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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 %[[BLOCK1:.*]]
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; CHECK: [[BLOCK1]]:
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; CHECK-NEXT: br label %[[END:.*]]
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; CHECK: [[END]]:
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; CHECK-NEXT: ret i32 poison
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;
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