6f0ca6fd23
JumpThreading may convert selects into branch instructions, in which case the condition needs to be frozen (as branch on poison is immediate undefined behavior, unlike select on poison). The necessary code for this is already in place, this just enables the option. Differential Revision: https://reviews.llvm.org/D125869
157 lines
8.3 KiB
LLVM
157 lines
8.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -jump-threading -S %s -o - | FileCheck %s --check-prefix=DEFAULT
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; RUN: opt -jump-threading -S -jump-threading-threshold=6 %s -o - | FileCheck %s --check-prefix=OVERIDE
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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define i32 @test_minsize(i32 %argc, i8** nocapture readonly %argv) local_unnamed_addr #0 {
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; DEFAULT-LABEL: @test_minsize(
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; DEFAULT-NEXT: entry:
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; DEFAULT-NEXT: [[CMP:%.*]] = icmp eq i32 [[ARGC:%.*]], 2
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; DEFAULT-NEXT: br i1 [[CMP]], label [[COND_TRUE:%.*]], label [[COND_END:%.*]]
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; DEFAULT: cond.true:
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; DEFAULT-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8*, i8** [[ARGV:%.*]], i32 1
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; DEFAULT-NEXT: [[TMP0:%.*]] = load i8*, i8** [[ARRAYIDX]], align 4
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; DEFAULT-NEXT: [[CALL:%.*]] = tail call i32 @atoi(i8* [[TMP0]])
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; DEFAULT-NEXT: br label [[COND_END]]
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; DEFAULT: cond.end:
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; DEFAULT-NEXT: [[COND:%.*]] = phi i32 [ [[CALL]], [[COND_TRUE]] ], [ 46, [[ENTRY:%.*]] ]
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; DEFAULT-NEXT: [[TMP1:%.*]] = mul i32 [[COND]], [[COND]]
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; DEFAULT-NEXT: [[TMP2:%.*]] = mul i32 [[TMP1]], [[TMP1]]
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; DEFAULT-NEXT: [[TMP3:%.*]] = mul i32 [[COND]], [[TMP2]]
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; DEFAULT-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[COND]], 0
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; DEFAULT-NEXT: [[COND_FR:%.*]] = freeze i1 [[TMP4]]
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; DEFAULT-NEXT: br i1 [[COND_FR]], label [[TMP5:%.*]], label [[TMP6:%.*]]
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; DEFAULT: 5:
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; DEFAULT-NEXT: br label [[TMP6]]
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; DEFAULT: 6:
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; DEFAULT-NEXT: [[TMP7:%.*]] = phi i32 [ [[COND]], [[TMP5]] ], [ 0, [[COND_END]] ]
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; DEFAULT-NEXT: [[TMP8:%.*]] = mul i32 [[TMP3]], [[TMP7]]
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; DEFAULT-NEXT: [[CALL33:%.*]] = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 [[TMP8]])
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; DEFAULT-NEXT: ret i32 0
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;
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; OVERIDE-LABEL: @test_minsize(
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; OVERIDE-NEXT: entry:
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; OVERIDE-NEXT: [[CMP:%.*]] = icmp eq i32 [[ARGC:%.*]], 2
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; OVERIDE-NEXT: br i1 [[CMP]], label [[COND_END:%.*]], label [[COND_END_THREAD:%.*]]
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; OVERIDE: cond.end:
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; OVERIDE-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8*, i8** [[ARGV:%.*]], i32 1
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; OVERIDE-NEXT: [[TMP0:%.*]] = load i8*, i8** [[ARRAYIDX]], align 4
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; OVERIDE-NEXT: [[CALL:%.*]] = tail call i32 @atoi(i8* [[TMP0]])
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; OVERIDE-NEXT: [[TMP1:%.*]] = mul i32 [[CALL]], [[CALL]]
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; OVERIDE-NEXT: [[TMP2:%.*]] = mul i32 [[TMP1]], [[TMP1]]
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; OVERIDE-NEXT: [[TMP3:%.*]] = mul i32 [[CALL]], [[TMP2]]
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; OVERIDE-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[CALL]], 0
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; OVERIDE-NEXT: [[COND_FR:%.*]] = freeze i1 [[TMP4]]
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; OVERIDE-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP6:%.*]]
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; OVERIDE: cond.end.thread:
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; OVERIDE-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[COND_END]] ], [ 205962976, [[ENTRY:%.*]] ]
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; OVERIDE-NEXT: [[COND3:%.*]] = phi i32 [ [[CALL]], [[COND_END]] ], [ 46, [[ENTRY]] ]
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; OVERIDE-NEXT: br label [[TMP6]]
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; OVERIDE: 6:
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; OVERIDE-NEXT: [[TMP7:%.*]] = phi i32 [ [[TMP5]], [[COND_END_THREAD]] ], [ [[TMP3]], [[COND_END]] ]
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; OVERIDE-NEXT: [[TMP8:%.*]] = phi i32 [ [[COND3]], [[COND_END_THREAD]] ], [ 0, [[COND_END]] ]
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; OVERIDE-NEXT: [[TMP9:%.*]] = mul i32 [[TMP7]], [[TMP8]]
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; OVERIDE-NEXT: [[CALL33:%.*]] = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 [[TMP9]])
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; OVERIDE-NEXT: ret i32 0
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;
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entry:
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%cmp = icmp eq i32 %argc, 2
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br i1 %cmp, label %cond.true, label %cond.end
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cond.true: ; preds = %entry
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i32 1
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%0 = load i8*, i8** %arrayidx, align 4
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%call = tail call i32 @atoi(i8* %0)
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br label %cond.end
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cond.end: ; preds = %entry, %cond.true
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%cond = phi i32 [ %call, %cond.true ], [ 46, %entry ]
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%1 = mul i32 %cond, %cond
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%2 = mul i32 %1, %1
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%3 = mul i32 %cond, %2
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%4 = icmp sgt i32 %cond, 0
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%spec.select = select i1 %4, i32 %cond, i32 0
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%5 = mul i32 %3, %spec.select
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%call33 = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %5) #4
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ret i32 0
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}
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define i32 @test_optsize(i32 %argc, i8** nocapture readonly %argv) local_unnamed_addr #1 {
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; DEFAULT-LABEL: @test_optsize(
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; DEFAULT-NEXT: entry:
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; DEFAULT-NEXT: [[CMP:%.*]] = icmp eq i32 [[ARGC:%.*]], 2
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; DEFAULT-NEXT: br i1 [[CMP]], label [[COND_END:%.*]], label [[COND_END_THREAD:%.*]]
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; DEFAULT: cond.end:
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; DEFAULT-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8*, i8** [[ARGV:%.*]], i32 1
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; DEFAULT-NEXT: [[TMP0:%.*]] = load i8*, i8** [[ARRAYIDX]], align 4
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; DEFAULT-NEXT: [[CALL:%.*]] = tail call i32 @atoi(i8* [[TMP0]])
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; DEFAULT-NEXT: [[TMP1:%.*]] = mul i32 [[CALL]], [[CALL]]
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; DEFAULT-NEXT: [[TMP2:%.*]] = mul i32 [[TMP1]], [[TMP1]]
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; DEFAULT-NEXT: [[TMP3:%.*]] = mul i32 [[CALL]], [[TMP2]]
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; DEFAULT-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[CALL]], 0
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; DEFAULT-NEXT: [[COND_FR:%.*]] = freeze i1 [[TMP4]]
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; DEFAULT-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP6:%.*]]
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; DEFAULT: cond.end.thread:
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; DEFAULT-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[COND_END]] ], [ 205962976, [[ENTRY:%.*]] ]
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; DEFAULT-NEXT: [[COND3:%.*]] = phi i32 [ [[CALL]], [[COND_END]] ], [ 46, [[ENTRY]] ]
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; DEFAULT-NEXT: br label [[TMP6]]
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; DEFAULT: 6:
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; DEFAULT-NEXT: [[TMP7:%.*]] = phi i32 [ [[TMP5]], [[COND_END_THREAD]] ], [ [[TMP3]], [[COND_END]] ]
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; DEFAULT-NEXT: [[TMP8:%.*]] = phi i32 [ [[COND3]], [[COND_END_THREAD]] ], [ 0, [[COND_END]] ]
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; DEFAULT-NEXT: [[TMP9:%.*]] = mul i32 [[TMP7]], [[TMP8]]
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; DEFAULT-NEXT: [[CALL33:%.*]] = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 [[TMP9]])
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; DEFAULT-NEXT: ret i32 0
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;
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; OVERIDE-LABEL: @test_optsize(
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; OVERIDE-NEXT: entry:
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; OVERIDE-NEXT: [[CMP:%.*]] = icmp eq i32 [[ARGC:%.*]], 2
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; OVERIDE-NEXT: br i1 [[CMP]], label [[COND_END:%.*]], label [[COND_END_THREAD:%.*]]
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; OVERIDE: cond.end:
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; OVERIDE-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8*, i8** [[ARGV:%.*]], i32 1
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; OVERIDE-NEXT: [[TMP0:%.*]] = load i8*, i8** [[ARRAYIDX]], align 4
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; OVERIDE-NEXT: [[CALL:%.*]] = tail call i32 @atoi(i8* [[TMP0]])
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; OVERIDE-NEXT: [[TMP1:%.*]] = mul i32 [[CALL]], [[CALL]]
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; OVERIDE-NEXT: [[TMP2:%.*]] = mul i32 [[TMP1]], [[TMP1]]
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; OVERIDE-NEXT: [[TMP3:%.*]] = mul i32 [[CALL]], [[TMP2]]
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; OVERIDE-NEXT: [[TMP4:%.*]] = icmp sgt i32 [[CALL]], 0
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; OVERIDE-NEXT: [[COND_FR:%.*]] = freeze i1 [[TMP4]]
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; OVERIDE-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP6:%.*]]
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; OVERIDE: cond.end.thread:
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; OVERIDE-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[COND_END]] ], [ 205962976, [[ENTRY:%.*]] ]
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; OVERIDE-NEXT: [[COND3:%.*]] = phi i32 [ [[CALL]], [[COND_END]] ], [ 46, [[ENTRY]] ]
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; OVERIDE-NEXT: br label [[TMP6]]
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; OVERIDE: 6:
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; OVERIDE-NEXT: [[TMP7:%.*]] = phi i32 [ [[TMP5]], [[COND_END_THREAD]] ], [ [[TMP3]], [[COND_END]] ]
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; OVERIDE-NEXT: [[TMP8:%.*]] = phi i32 [ [[COND3]], [[COND_END_THREAD]] ], [ 0, [[COND_END]] ]
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; OVERIDE-NEXT: [[TMP9:%.*]] = mul i32 [[TMP7]], [[TMP8]]
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; OVERIDE-NEXT: [[CALL33:%.*]] = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 [[TMP9]])
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; OVERIDE-NEXT: ret i32 0
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;
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entry:
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%cmp = icmp eq i32 %argc, 2
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br i1 %cmp, label %cond.true, label %cond.end
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cond.true: ; preds = %entry
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i32 1
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%0 = load i8*, i8** %arrayidx, align 4
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%call = tail call i32 @atoi(i8* %0)
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br label %cond.end
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cond.end: ; preds = %entry, %cond.true
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%cond = phi i32 [ %call, %cond.true ], [ 46, %entry ]
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%1 = mul i32 %cond, %cond
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%2 = mul i32 %1, %1
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%3 = mul i32 %cond, %2
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%4 = icmp sgt i32 %cond, 0
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%spec.select = select i1 %4, i32 %cond, i32 0
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%5 = mul i32 %3, %spec.select
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%call33 = tail call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %5) #4
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ret i32 0
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}
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declare i32 @atoi(i8* nocapture) local_unnamed_addr
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declare i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr
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attributes #0 = { minsize optsize }
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attributes #1 = { optsize }
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