This patch enables printing of constants to see which instructions were
constant-folded. Needed for tests and better visiual analysis of
inliner's work.
Reviewers: apilipenko, mtrofin, davidxl, fedor.sergeev
Reviewed By: mtrofin
Differential Revision: https://reviews.llvm.org/D81024
InlineResult analyze();
+ Optional<Constant*> getSimplifiedValue(Instruction *I) {
+ if (SimplifiedValues.find(I) != SimplifiedValues.end())
+ return SimplifiedValues[I];
+ return None;
+ }
+
// Keep a bunch of stats about the cost savings found so we can print them
// out when debugging.
unsigned NumConstantArgs = 0;
if (Record->hasThresholdChanged())
OS << ", threshold delta = " << Record->getThresholdDelta();
}
+ auto C = ICCA->getSimplifiedValue(const_cast<Instruction *>(I));
+ if (C) {
+ OS << ", simplified to ";
+ C.getValue()->print(OS, true);
+ }
OS << "\n";
}
--- /dev/null
+; RUN: opt < %s -passes="print<inline-cost>" 2>&1 | FileCheck %s
+
+; CHECK-LABEL: @test()
+; CHECK: cost before = {{.*}}, cost after = {{.*}}, threshold before = {{.*}}, threshold after = {{.*}}, cost delta = {{.*}}, simplified to i1 false
+; CHECK: %1 = icmp eq i32 4, 5
+
+define i32 @test() {
+ %1 = icmp eq i32 4, 5
+ ret i32 0
+}
+
+define void @main() {
+ %1 = call i32 @test()
+ ret void
+}