c4a60c9d34
This is an attempt to reland D42600 and enabling this optimisation by default. This also resolves the issue pointed out in the context of PGO build. Differential Revision: https://reviews.llvm.org/D42600
71 lines
2.0 KiB
LLVM
71 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
;RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
|
|
|
|
define void @bar(i32 %0, i32 %1) nounwind {
|
|
; CHECK-LABEL: bar:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: testl %edi, %edi
|
|
; CHECK-NEXT: je .LBB0_4
|
|
; CHECK-NEXT: # %bb.1: # %.preheader
|
|
; CHECK-NEXT: pushq %rbx
|
|
; CHECK-NEXT: movl %edi, %ebx
|
|
; CHECK-NEXT: decl %ebx
|
|
; CHECK-NEXT: .p2align 4, 0x90
|
|
; CHECK-NEXT: .LBB0_2: # =>This Inner Loop Header: Depth=1
|
|
; CHECK-NEXT: movl %ebx, %edi
|
|
; CHECK-NEXT: callq foo@PLT
|
|
; CHECK-NEXT: addl $-1, %ebx
|
|
; CHECK-NEXT: jb .LBB0_2
|
|
; CHECK-NEXT: # %bb.3:
|
|
; CHECK-NEXT: popq %rbx
|
|
; CHECK-NEXT: .LBB0_4:
|
|
; CHECK-NEXT: retq
|
|
%3 = icmp eq i32 %0, 0
|
|
br i1 %3, label %8, label %4
|
|
|
|
4: ; preds = %2, %4
|
|
%5 = phi i32 [ %6, %4 ], [ %0, %2 ]
|
|
%6 = add nsw i32 %5, -1
|
|
tail call void @foo(i32 %6)
|
|
%7 = icmp eq i32 %6, 0
|
|
br i1 %7, label %8, label %4
|
|
|
|
8: ; preds = %4, %2
|
|
ret void
|
|
}
|
|
|
|
define void @baz(i32 %0, i32 %1) nounwind {
|
|
; CHECK-LABEL: baz:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: testl %edi, %edi
|
|
; CHECK-NEXT: je .LBB1_4
|
|
; CHECK-NEXT: # %bb.1: # %.preheader
|
|
; CHECK-NEXT: pushq %rbx
|
|
; CHECK-NEXT: movl %edi, %ebx
|
|
; CHECK-NEXT: decl %ebx
|
|
; CHECK-NEXT: .p2align 4, 0x90
|
|
; CHECK-NEXT: .LBB1_2: # =>This Inner Loop Header: Depth=1
|
|
; CHECK-NEXT: movl %ebx, %edi
|
|
; CHECK-NEXT: callq foo@PLT
|
|
; CHECK-NEXT: addl $-1, %ebx
|
|
; CHECK-NEXT: jae .LBB1_2
|
|
; CHECK-NEXT: # %bb.3:
|
|
; CHECK-NEXT: popq %rbx
|
|
; CHECK-NEXT: .LBB1_4:
|
|
; CHECK-NEXT: retq
|
|
%3 = icmp eq i32 %0, 0
|
|
br i1 %3, label %8, label %4
|
|
|
|
4: ; preds = %2, %4
|
|
%5 = phi i32 [ %6, %4 ], [ %0, %2 ]
|
|
%6 = add nsw i32 %5, -1
|
|
tail call void @foo(i32 %6)
|
|
%7 = icmp ne i32 %6, 0
|
|
br i1 %7, label %8, label %4
|
|
|
|
8: ; preds = %4, %2
|
|
ret void
|
|
}
|
|
|
|
declare void @foo(i32)
|