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https://github.com/RPCS3/llvm-mirror.git
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83dddda4a1
In the ELFv2 ABI, we are not required to save all CR fields. If only one nonvolatile CR field is clobbered, use mfocrf instead of mfcr to selectively save the field, because mfocrf has short latency compares to mfcr. Thanks Nemanja's invaluable hint! Reviewers: nemanjai tjablin hfinkel kbarton http://reviews.llvm.org/D17749 llvm-svn: 266038
119 lines
4.3 KiB
LLVM
119 lines
4.3 KiB
LLVM
; RUN: llc -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
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%struct.anon = type { %struct.anon.0, %struct.anon.1 }
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%struct.anon.0 = type { i32 }
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%struct.anon.1 = type { i32 }
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@i = common global i32 0, align 4
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@b = common global i32* null, align 8
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@c = common global i32 0, align 4
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@a = common global i32 0, align 4
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@h = common global i32 0, align 4
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@g = common global i32 0, align 4
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@j = common global i32 0, align 4
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@f = common global %struct.anon zeroinitializer, align 4
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@d = common global i32 0, align 4
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@e = common global i32 0, align 4
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; Function Attrs: norecurse nounwind
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define signext i32 @fn1(i32* nocapture %p1, i32 signext %p2, i32* nocapture %p3) {
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entry:
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%0 = load i32, i32* @i, align 4, !tbaa !1
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%cond = icmp eq i32 %0, 8
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br i1 %cond, label %if.end16, label %while.cond.preheader
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while.cond.preheader: ; preds = %entry
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%1 = load i32*, i32** @b, align 8, !tbaa !5
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%2 = load i32, i32* %1, align 4, !tbaa !1
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%tobool18 = icmp eq i32 %2, 0
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br i1 %tobool18, label %while.end, label %while.body.lr.ph
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while.body.lr.ph: ; preds = %while.cond.preheader
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%.pre = load i32, i32* @c, align 4, !tbaa !1
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br label %while.body
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while.body: ; preds = %while.body.backedge, %while.body.lr.ph
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switch i32 %.pre, label %while.body.backedge [
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i32 0, label %sw.bb1
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i32 80, label %sw.bb1
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i32 60, label %sw.bb1
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i32 240, label %while.cond.backedge
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]
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while.body.backedge: ; preds = %while.body, %while.cond.backedge
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br label %while.body
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sw.bb1: ; preds = %while.body, %while.body, %while.body
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store i32 2, i32* @a, align 4, !tbaa !1
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br label %while.cond.backedge
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while.cond.backedge: ; preds = %while.body, %sw.bb1
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store i32 4, i32* @a, align 4, !tbaa !1
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%.pre19 = load i32, i32* %1, align 4, !tbaa !1
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%tobool = icmp eq i32 %.pre19, 0
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br i1 %tobool, label %while.end.loopexit, label %while.body.backedge
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while.end.loopexit: ; preds = %while.cond.backedge
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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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%3 = load i32, i32* @h, align 4, !tbaa !1
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%mul = mul nsw i32 %0, %3
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%4 = load i32, i32* @g, align 4, !tbaa !1
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%mul4 = mul nsw i32 %mul, %4
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store i32 %mul4, i32* @j, align 4, !tbaa !1
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%5 = load i32, i32* getelementptr inbounds (%struct.anon, %struct.anon* @f, i64 0, i32 0, i32 0), align 4, !tbaa !7
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%tobool5 = icmp eq i32 %5, 0
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br i1 %tobool5, label %if.end, label %if.then
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if.then: ; preds = %while.end
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%div = sdiv i32 %5, %mul
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store i32 %div, i32* @g, align 4, !tbaa !1
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br label %if.end
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if.end: ; preds = %while.end, %if.then
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%6 = phi i32 [ %4, %while.end ], [ %div, %if.then ]
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%7 = load i32, i32* getelementptr inbounds (%struct.anon, %struct.anon* @f, i64 0, i32 1, i32 0), align 4, !tbaa !10
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%tobool7 = icmp ne i32 %7, 0
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%tobool8 = icmp ne i32 %mul4, 0
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%or.cond = and i1 %tobool7, %tobool8
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%tobool10 = icmp ne i32 %0, 0
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%or.cond17 = and i1 %or.cond, %tobool10
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br i1 %or.cond17, label %if.then11, label %if.end13
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if.then11: ; preds = %if.end
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store i32 %3, i32* @d, align 4, !tbaa !1
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%8 = load i32, i32* @e, align 4, !tbaa !1
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store i32 %8, i32* %p3, align 4, !tbaa !1
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%.pre20 = load i32, i32* @g, align 4, !tbaa !1
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br label %if.end13
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if.end13: ; preds = %if.then11, %if.end
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%9 = phi i32 [ %.pre20, %if.then11 ], [ %6, %if.end ]
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%tobool14 = icmp eq i32 %9, 0
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br i1 %tobool14, label %if.end16, label %if.then15
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if.then15: ; preds = %if.end13
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store i32 %p2, i32* %p1, align 4, !tbaa !1
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br label %if.end16
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if.end16: ; preds = %entry, %if.end13, %if.then15
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ret i32 2
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}
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; CHECK: mfocrf {{[0-9]+}}
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!llvm.ident = !{!0}
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!0 = !{!"clang version 3.9.0 (trunk 261520)"}
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!1 = !{!2, !2, i64 0}
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!2 = !{!"int", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C/C++ TBAA"}
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!5 = !{!6, !6, i64 0}
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!6 = !{!"any pointer", !3, i64 0}
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!7 = !{!8, !2, i64 0}
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!8 = !{!"", !9, i64 0, !9, i64 4}
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!9 = !{!"", !2, i64 0}
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!10 = !{!8, !2, i64 4}
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