forked from OSchip/llvm-project
84 lines
2.4 KiB
LLVM
84 lines
2.4 KiB
LLVM
; RUN: opt %s -simplifycfg -S | FileCheck %s --check-prefix=NORMAL
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; RUN: opt %s -simplifycfg -S -bonus-inst-threshold=2 | FileCheck %s --check-prefix=AGGRESSIVE
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; RUN: opt %s -simplifycfg -S -bonus-inst-threshold=4 | FileCheck %s --check-prefix=WAYAGGRESSIVE
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; RUN: opt %s -passes=simplify-cfg -S | FileCheck %s --check-prefix=NORMAL
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; RUN: opt %s -passes='simplify-cfg<bonus-inst-threshold=2>' -S | FileCheck %s --check-prefix=AGGRESSIVE
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; RUN: opt %s -passes='simplify-cfg<bonus-inst-threshold=4>' -S | FileCheck %s --check-prefix=WAYAGGRESSIVE
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define i32 @foo(i32 %a, i32 %b, i32 %c, i32 %d, i32* %input) {
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; NORMAL-LABEL: @foo(
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; AGGRESSIVE-LABEL: @foo(
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entry:
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%cmp = icmp sgt i32 %d, 3
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br i1 %cmp, label %cond.end, label %lor.lhs.false
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; NORMAL: br i1
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; AGGRESSIVE: br i1
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lor.lhs.false:
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%mul = shl i32 %c, 1
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%add = add nsw i32 %mul, %a
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%cmp1 = icmp slt i32 %add, %b
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br i1 %cmp1, label %cond.false, label %cond.end
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; NORMAL: br i1
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; AGGRESSIVE-NOT: br i1
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cond.false:
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%0 = load i32, i32* %input, align 4
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br label %cond.end
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cond.end:
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%cond = phi i32 [ %0, %cond.false ], [ 0, %lor.lhs.false ], [ 0, %entry ]
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ret i32 %cond
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}
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declare void @distinct_a();
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declare void @distinct_b();
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;; Like foo, but have to duplicate into multiple predecessors
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define i32 @bar(i32 %a, i32 %b, i32 %c, i32 %d, i32* %input) {
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; NORMAL-LABEL: @bar(
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; AGGRESSIVE-LABEL: @bar(
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entry:
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%cmp_split = icmp slt i32 %d, %b
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%cmp = icmp sgt i32 %d, 3
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br i1 %cmp_split, label %pred_a, label %pred_b
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pred_a:
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; NORMAL-LABEL: pred_a:
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; AGGRESSIVE-LABEL: pred_a:
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; WAYAGGRESSIVE-LABEL: pred_a:
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; NORMAL: br i1
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; AGGRESSIVE: br i1
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; WAYAGGRESSIVE: br i1
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call void @distinct_a();
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br i1 %cmp, label %cond.end, label %lor.lhs.false
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pred_b:
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; NORMAL-LABEL: pred_b:
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; AGGRESSIVE-LABEL: pred_b:
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; WAYAGGRESSIVE-LABEL: pred_b:
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; NORMAL: br i1
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; AGGRESSIVE: br i1
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; WAYAGGRESSIVE: br i1
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call void @distinct_b();
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br i1 %cmp, label %cond.end, label %lor.lhs.false
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lor.lhs.false:
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%mul = shl i32 %c, 1
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%add = add nsw i32 %mul, %a
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%cmp1 = icmp slt i32 %add, %b
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br i1 %cmp1, label %cond.false, label %cond.end
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; NORMAL-LABEL: lor.lhs.false:
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; AGGRESIVE-LABEL: lor.lhs.false:
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; WAYAGGRESIVE-LABEL: lor.lhs.false:
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; NORMAL: br i1
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; AGGRESSIVE: br i1
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; WAYAGGRESSIVE-NOT: br i1
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cond.false:
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%0 = load i32, i32* %input, align 4
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br label %cond.end
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cond.end:
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%cond = phi i32 [ %0, %cond.false ], [ 0, %lor.lhs.false ],[ 0, %pred_a ],[ 0, %pred_b ]
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ret i32 %cond
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}
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