| ; REQUIRES: asserts |
| ; RUN: opt -function-specialization -debug -S < %s 2>&1 | FileCheck %s |
| |
| ; The purpose of this test is to check that we don't run the solver as there's |
| ; nothing to do here. For a test that doesn't trigger function specialisation, |
| ; it is intentionally 'big' because we also want to check that the ssa.copy |
| ; intrinsics that are introduced by the solver are cleaned up if we bail |
| ; early. Thus, first check the debug messages for the introduction of these |
| ; intrinsics: |
| |
| ; CHECK: FnSpecialization: Analysing decl: foo |
| ; CHECK: Found replacement{{.*}} call i32 @llvm.ssa.copy.i32 |
| ; CHECK: Found replacement{{.*}} call i32 @llvm.ssa.copy.i32 |
| |
| ; Then, make sure the solver didn't run: |
| |
| ; CHECK-NOT: Running solver |
| |
| ; Finally, check the absence and thus removal of these intrinsics: |
| |
| ; CHECK-LABEL: @foo |
| ; CHECK-NOT: call i32 @llvm.ssa.copy.i32 |
| |
| @N = external dso_local global i32, align 4 |
| @B = external dso_local global i32*, align 8 |
| @A = external dso_local global i32*, align 8 |
| |
| define dso_local i32 @foo() { |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %0 = load i32, i32* @N, align 4 |
| %cmp = icmp slt i32 %i.0, %0 |
| br i1 %cmp, label %for.body, label %for.cond.cleanup |
| |
| for.cond.cleanup: |
| ret i32 undef |
| |
| for.body: |
| %1 = load i32*, i32** @B, align 8 |
| %idxprom = sext i32 %i.0 to i64 |
| %arrayidx = getelementptr inbounds i32, i32* %1, i64 %idxprom |
| %2 = load i32, i32* %arrayidx, align 4 |
| %3 = load i32*, i32** @A, align 8 |
| %arrayidx2 = getelementptr inbounds i32, i32* %3, i64 %idxprom |
| store i32 %2, i32* %arrayidx2, align 4 |
| %inc = add nsw i32 %i.0, 1 |
| br label %for.cond |
| } |