derek.holloway
7502bf64a4
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117 lines
3.5 KiB
LLVM
117 lines
3.5 KiB
LLVM
; RUN: opt -S -passes=hotcoldsplit -hotcoldsplit-threshold=0 < %s | FileCheck %s
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; Source:
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;
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; extern void sideeffect(int);
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; extern void __attribute__((cold)) sink();
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; void foo(int cond) {
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; if (cond) { //< Start outlining here.
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; while (cond > 10) {
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; --cond;
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; sideeffect(0);
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; }
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; sink();
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; }
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; sideeffect(1);
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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; CHECK-LABEL: define {{.*}}@foo(
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; CHECK: br i1 {{.*}}, label %if.end, label %codeRepl
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; CHECK-LABEL: codeRepl:
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; CHECK-NEXT: call void @foo.cold.1
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; CHECK-LABEL: if.end:
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; CHECK: call void @sideeffect(i32 1)
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define void @foo(i32 %cond) {
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entry:
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%tobool = icmp eq i32 %cond, 0
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br i1 %tobool, label %if.end, label %while.cond.preheader
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while.cond.preheader: ; preds = %entry
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%cmp3 = icmp sgt i32 %cond, 10
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br i1 %cmp3, label %while.body.preheader, label %while.end
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while.body.preheader: ; preds = %while.cond.preheader
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br label %while.body
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while.body: ; preds = %while.body.preheader, %while.body
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%cond.addr.04 = phi i32 [ %dec, %while.body ], [ %cond, %while.body.preheader ]
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%dec = add nsw i32 %cond.addr.04, -1
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tail call void @sideeffect(i32 0) #3
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%cmp = icmp sgt i32 %dec, 10
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br i1 %cmp, label %while.body, label %while.end.loopexit
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while.end.loopexit: ; preds = %while.body
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %while.cond.preheader
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tail call void (...) @sink()
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ret void
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if.end: ; preds = %entry
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tail call void @sideeffect(i32 1)
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ret void
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}
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; This is the same as @foo, but the while loop comes after the sink block.
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; CHECK-LABEL: define {{.*}}@while_loop_after_sink(
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; CHECK: br i1 {{.*}}, label %if.end, label %codeRepl
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; CHECK-LABEL: codeRepl:
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; CHECK-NEXT: call void @while_loop_after_sink.cold.1
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; CHECK-LABEL: if.end:
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; CHECK: call void @sideeffect(i32 1)
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define void @while_loop_after_sink(i32 %cond) {
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entry:
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%tobool = icmp eq i32 %cond, 0
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br i1 %tobool, label %if.end, label %sink
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sink:
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tail call void (...) @sink()
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br label %while.cond.preheader
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while.cond.preheader:
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%cmp3 = icmp sgt i32 %cond, 10
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br i1 %cmp3, label %while.body.preheader, label %while.end
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while.body.preheader: ; preds = %while.cond.preheader
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br label %while.body
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while.body: ; preds = %while.body.preheader, %while.body
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%cond.addr.04 = phi i32 [ %dec, %while.body ], [ %cond, %while.body.preheader ]
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%dec = add nsw i32 %cond.addr.04, -1
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tail call void @sideeffect(i32 0) #3
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%cmp = icmp sgt i32 %dec, 10
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br i1 %cmp, label %while.body, label %while.end.loopexit
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while.end.loopexit: ; preds = %while.body
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %while.cond.preheader
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ret void
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if.end: ; preds = %entry
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tail call void @sideeffect(i32 1)
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ret void
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}
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; CHECK-LABEL: define {{.*}}@foo.cold.1
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; CHECK: phi i32
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; CHECK-NEXT: add nsw i32
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; CHECK-NEXT: call {{.*}}@sideeffect
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; CHECK-NEXT: icmp
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; CHECK-NEXT: br
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; CHECK-LABEL: define {{.*}}@while_loop_after_sink.cold.1
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; CHECK: call {{.*}}@sink
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; CHECK: phi i32
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; CHECK-NEXT: add nsw i32
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; CHECK-NEXT: call {{.*}}@sideeffect
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; CHECK-NEXT: icmp
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; CHECK-NEXT: br
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declare void @sideeffect(i32)
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declare void @sink(...) cold
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