| ; RUN: opt -S -callsite-splitting -callsite-splitting-duplication-threshold=100000000 < %s | FileCheck -enable-var-scope %s |
| |
| ; Convergent calls should not be duplicated in this case |
| ; CHECK-LABEL: define void @convergent_caller( |
| ; CHECK: call void @convergent_callee( |
| ; CHECK-NOT: call void @convergent_callee( |
| define void @convergent_caller(i1 %c, i8* %a_elt, i8* %b_elt) #0 { |
| entry: |
| br label %Top |
| |
| Top: |
| %tobool1 = icmp eq i8* %a_elt, null |
| br i1 %tobool1, label %CallSiteBB, label %NextCond |
| |
| NextCond: |
| %cmp = icmp ne i8* %b_elt, null |
| br i1 %cmp, label %CallSiteBB, label %End |
| |
| CallSiteBB: |
| %p = phi i1 [ false, %Top ], [ %c, %NextCond ] |
| call void @convergent_callee(i8* %a_elt, i1 %p) |
| br label %End |
| |
| End: |
| ret void |
| } |
| |
| ; CHECK-LABEL: define void @convergent_callee( |
| ; CHECK: call void @convergent_external( |
| ; CHECK-NOT: call void @convergent_external( |
| define void @convergent_callee(i8* %a_elt, i1 %c) #0 { |
| entry: |
| %tobool = icmp ne i8* %a_elt, null |
| br i1 %tobool, label %then, label %endif |
| |
| then: |
| br label %endif |
| |
| endif: |
| call void @convergent_external(i8* %a_elt) #0 |
| ret void |
| } |
| |
| ; Make sure an otherwise identical function is transformed |
| ; CHECK-LABEL: define void @reference_caller( |
| ; CHECK: call void @nonconvergent_callee( |
| ; CHECK: call void @nonconvergent_callee( |
| define void @reference_caller(i1 %c, i8* %a_elt, i8* %b_elt) #1 { |
| entry: |
| br label %Top |
| |
| Top: |
| %tobool1 = icmp eq i8* %a_elt, null |
| br i1 %tobool1, label %CallSiteBB, label %NextCond |
| |
| NextCond: |
| %cmp = icmp ne i8* %b_elt, null |
| br i1 %cmp, label %CallSiteBB, label %End |
| |
| CallSiteBB: |
| %p = phi i1 [ false, %Top ], [ %c, %NextCond ] |
| call void @nonconvergent_callee(i8* %a_elt, i1 %p) |
| br label %End |
| |
| End: |
| ret void |
| } |
| |
| ; CHECK-LABEL: define void @nonconvergent_callee( |
| ; CHECK: call void @nonconvergent_external( |
| ; CHECK-NOT: call void @nonconvergent_external( |
| define void @nonconvergent_callee(i8* %a_elt, i1 %c) #1 { |
| entry: |
| %tobool = icmp ne i8* %a_elt, null |
| br i1 %tobool, label %then, label %endif |
| |
| then: |
| br label %endif |
| |
| endif: |
| call void @nonconvergent_external(i8* %a_elt) |
| ret void |
| } |
| |
| declare void @convergent_external(i8*) #0 |
| declare void @nonconvergent_external(i8*) #1 |
| |
| attributes #0 = { convergent nounwind } |
| attributes #1 = { nounwind } |
