2020-12-20 03:23:35 +08:00
|
|
|
; RUN: opt %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s --check-prefix=NORMAL
|
|
|
|
; RUN: opt %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -bonus-inst-threshold=2 | FileCheck %s --check-prefix=AGGRESSIVE
|
|
|
|
; RUN: opt %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -bonus-inst-threshold=4 | FileCheck %s --check-prefix=WAYAGGRESSIVE
|
2021-07-08 20:24:03 +08:00
|
|
|
; RUN: opt %s -passes=simplifycfg -S | FileCheck %s --check-prefix=NORMAL
|
|
|
|
; RUN: opt %s -passes='simplifycfg<bonus-inst-threshold=2>' -S | FileCheck %s --check-prefix=AGGRESSIVE
|
|
|
|
; RUN: opt %s -passes='simplifycfg<bonus-inst-threshold=4>' -S | FileCheck %s --check-prefix=WAYAGGRESSIVE
|
2019-04-17 12:52:47 +08:00
|
|
|
|
|
|
|
define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d, i32* %input) {
|
|
|
|
; NORMAL-LABEL: @foo(
|
|
|
|
; AGGRESSIVE-LABEL: @foo(
|
|
|
|
entry:
|
|
|
|
%cmp = icmp sgt i32 %d, 3
|
|
|
|
br i1 %cmp, label %cond.end, label %lor.lhs.false
|
|
|
|
; NORMAL: br i1
|
|
|
|
; AGGRESSIVE: br i1
|
|
|
|
|
|
|
|
lor.lhs.false:
|
|
|
|
%mul = shl i32 %c, 1
|
|
|
|
%add = add nsw i32 %mul, %a
|
|
|
|
%cmp1 = icmp slt i32 %add, %b
|
|
|
|
br i1 %cmp1, label %cond.false, label %cond.end
|
|
|
|
; NORMAL: br i1
|
|
|
|
; AGGRESSIVE-NOT: br i1
|
|
|
|
|
|
|
|
cond.false:
|
|
|
|
%0 = load i32, i32* %input, align 4
|
|
|
|
br label %cond.end
|
|
|
|
|
|
|
|
cond.end:
|
|
|
|
%cond = phi i32 [ %0, %cond.false ], [ 0, %lor.lhs.false ], [ 0, %entry ]
|
|
|
|
ret i32 %cond
|
|
|
|
}
|
|
|
|
|
|
|
|
declare void @distinct_a();
|
|
|
|
declare void @distinct_b();
|
|
|
|
|
|
|
|
;; Like foo, but have to duplicate into multiple predecessors
|
|
|
|
define i32 @bar(i32 %a, i32 %b, i32 %c, i32 %d, i32* %input) {
|
|
|
|
; NORMAL-LABEL: @bar(
|
|
|
|
; AGGRESSIVE-LABEL: @bar(
|
|
|
|
entry:
|
|
|
|
%cmp_split = icmp slt i32 %d, %b
|
|
|
|
%cmp = icmp sgt i32 %d, 3
|
|
|
|
br i1 %cmp_split, label %pred_a, label %pred_b
|
|
|
|
pred_a:
|
|
|
|
; NORMAL-LABEL: pred_a:
|
|
|
|
; AGGRESSIVE-LABEL: pred_a:
|
|
|
|
; WAYAGGRESSIVE-LABEL: pred_a:
|
|
|
|
; NORMAL: br i1
|
|
|
|
; AGGRESSIVE: br i1
|
|
|
|
; WAYAGGRESSIVE: br i1
|
|
|
|
call void @distinct_a();
|
|
|
|
br i1 %cmp, label %cond.end, label %lor.lhs.false
|
|
|
|
pred_b:
|
|
|
|
; NORMAL-LABEL: pred_b:
|
|
|
|
; AGGRESSIVE-LABEL: pred_b:
|
|
|
|
; WAYAGGRESSIVE-LABEL: pred_b:
|
|
|
|
; NORMAL: br i1
|
|
|
|
; AGGRESSIVE: br i1
|
|
|
|
; WAYAGGRESSIVE: br i1
|
|
|
|
call void @distinct_b();
|
|
|
|
br i1 %cmp, label %cond.end, label %lor.lhs.false
|
|
|
|
|
|
|
|
lor.lhs.false:
|
|
|
|
%mul = shl i32 %c, 1
|
|
|
|
%add = add nsw i32 %mul, %a
|
|
|
|
%cmp1 = icmp slt i32 %add, %b
|
|
|
|
br i1 %cmp1, label %cond.false, label %cond.end
|
|
|
|
; NORMAL-LABEL: lor.lhs.false:
|
|
|
|
; AGGRESIVE-LABEL: lor.lhs.false:
|
|
|
|
; WAYAGGRESIVE-LABEL: lor.lhs.false:
|
|
|
|
; NORMAL: br i1
|
|
|
|
; AGGRESSIVE: br i1
|
|
|
|
; WAYAGGRESSIVE-NOT: br i1
|
|
|
|
|
|
|
|
cond.false:
|
|
|
|
%0 = load i32, i32* %input, align 4
|
|
|
|
br label %cond.end
|
|
|
|
|
|
|
|
cond.end:
|
|
|
|
%cond = phi i32 [ %0, %cond.false ], [ 0, %lor.lhs.false ],[ 0, %pred_a ],[ 0, %pred_b ]
|
|
|
|
ret i32 %cond
|
|
|
|
}
|