e19a5fc6d3
Only accumulate the codesize increase of functions that are actually specialized, rather than for every candidate specialization that we analyse. This fixes a subtle bug where prior analysis of candidate specializations that were deemed unprofitable could prevent subsequent profitable candidates from being recognised.
45 lines
1.7 KiB
LLVM
45 lines
1.7 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=50 \
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; RUN: -funcspec-max-codesize-growth=1 \
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; RUN: -S < %s | FileCheck %s
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; Verify that we are able to specialize a function successfully after analysis
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; of other specializations that are found to not be profitable.
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define void @test_specialize_after_failed_analysis(i32 %n) {
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entry:
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%notspec0 = call i32 @add(i32 0, i32 %n)
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%notspec1 = call i32 @add(i32 1, i32 %n)
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%spec = call i32 @add(i32 1, i32 1)
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ret void
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}
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define i32 @add(i32 %x, i32 %y) {
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entry:
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%res = add i32 %x, %y
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ret i32 %res
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}
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; CHECK-LABEL: define void @test_specialize_after_failed_analysis(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[NOTSPEC0:%.*]] = call i32 @add(i32 0, i32 [[N]])
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; CHECK-NEXT: [[NOTSPEC1:%.*]] = call i32 @add(i32 1, i32 [[N]])
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; CHECK-NEXT: [[SPEC:%.*]] = call i32 @add.specialized.1(i32 1, i32 1)
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; CHECK-NEXT: ret void
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;
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;
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; CHECK-LABEL: define i32 @add(
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; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[RES:%.*]] = add i32 [[X]], [[Y]]
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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 @add.specialized.1(
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; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: ret i32 poison
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;
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