e8f4e41b6b
We use the same similarity scheme we used for branch instructions for phi nodes, and allow them to be outlined. There is not a lot of special handling needed for these phi nodes when outlining, as they simply act as outputs. The code extractor does not currently allow for non entry blocks within the extracted region to have predecessors, so there are not conflicts to handle with respect to predecessors no longer contained in the function.
Recommit of 515eec3553
Reviewers: paquette
Differential Revision: https://reviews.llvm.org/D106997
75 lines
2.3 KiB
LLVM
75 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs
|
|
; RUN: opt -S -verify -iroutliner -ir-outlining-no-cost < %s | FileCheck %s
|
|
|
|
; Show that we do extract phi nodes from the regions.
|
|
|
|
define void @function1(i32* %a, i32* %b) {
|
|
entry:
|
|
%0 = alloca i32, align 4
|
|
%c = load i32, i32* %0, align 4
|
|
br label %test1
|
|
test1:
|
|
%e = load i32, i32* %0, align 4
|
|
br label %first
|
|
test:
|
|
%d = load i32, i32* %0, align 4
|
|
br label %first
|
|
first:
|
|
%1 = phi i32 [ %c, %test ], [ %e, %test1 ]
|
|
store i32 2, i32* %a, align 4
|
|
store i32 3, i32* %b, align 4
|
|
ret void
|
|
}
|
|
|
|
define void @function2(i32* %a, i32* %b) {
|
|
entry:
|
|
%0 = alloca i32, align 4
|
|
%c = load i32, i32* %0, align 4
|
|
br label %test1
|
|
test1:
|
|
%e = load i32, i32* %0, align 4
|
|
br label %first
|
|
test:
|
|
%d = load i32, i32* %0, align 4
|
|
br label %first
|
|
first:
|
|
%1 = phi i32 [ %c, %test ], [ %e, %test1 ]
|
|
store i32 2, i32* %a, align 4
|
|
store i32 3, i32* %b, align 4
|
|
ret void
|
|
}
|
|
; CHECK-LABEL: @function1(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @outlined_ir_func_0(i32* [[TMP0]], i32* [[A:%.*]], i32* [[B:%.*]])
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
;
|
|
; CHECK-LABEL: @function2(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @outlined_ir_func_0(i32* [[TMP0]], i32* [[A:%.*]], i32* [[B:%.*]])
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
;
|
|
; CHECK: define internal void @outlined_ir_func_0(
|
|
; CHECK-NEXT: newFuncRoot:
|
|
; CHECK-NEXT: br label [[ENTRY_TO_OUTLINE:%.*]]
|
|
; CHECK: entry_to_outline:
|
|
; CHECK-NEXT: [[C:%.*]] = load i32, i32* [[TMP0:%.*]], align 4
|
|
; CHECK-NEXT: br label [[TEST1:%.*]]
|
|
; CHECK: test1:
|
|
; CHECK-NEXT: [[E:%.*]] = load i32, i32* [[TMP0]], align 4
|
|
; CHECK-NEXT: br label [[FIRST:%.*]]
|
|
; CHECK: test:
|
|
; CHECK-NEXT: [[D:%.*]] = load i32, i32* [[TMP0]], align 4
|
|
; CHECK-NEXT: br label [[FIRST]]
|
|
; CHECK: first:
|
|
; CHECK-NEXT: [[TMP3:%.*]] = phi i32 [ [[C]], [[TEST:%.*]] ], [ [[E]], [[TEST1]] ]
|
|
; CHECK-NEXT: store i32 2, i32* [[TMP1:%.*]], align 4
|
|
; CHECK-NEXT: store i32 3, i32* [[TMP2:%.*]], align 4
|
|
; CHECK-NEXT: br label [[ENTRY_AFTER_OUTLINE_EXITSTUB:%.*]]
|
|
; CHECK: entry_after_outline.exitStub:
|
|
; CHECK-NEXT: ret void
|
|
;
|