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https://github.com/RPCS3/llvm-mirror.git
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f59a462ea6
This commit came as a result for revert of patch r317579 (originally committed as r317100). The patch made CFI instructions duplicable, because their existence in the epilogue block was affecting the Tail duplication pass. However, duplicating blocks with CFI instructions was an issue for compact unwind info on Darwin, which is why the patch was reverted. This patch allows duplicating tails with CFI instructions, though they are not duplicable, by copying them 'manually'. Patch by Djordje Kovacevic. Differential Revision: https://reviews.llvm.org/D40979 llvm-svn: 323883
97 lines
3.9 KiB
LLVM
97 lines
3.9 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc -mtriple=arm64-unknown-linux-gnu -debug-only=tailduplication %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=LINUX
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; RUN: llc -mtriple=arm64-apple-darwin -debug-only=tailduplication %s -o /dev/null 2>&1 | FileCheck %s --check-prefix=DARWIN
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; ModuleID = 'taildup-cfi.c'
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source_filename = "taildup-cfi.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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@g = common local_unnamed_addr global i32 0, align 4
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@f = common local_unnamed_addr global i32 0, align 4
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@a = common local_unnamed_addr global i32 0, align 4
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@m = common local_unnamed_addr global i32 0, align 4
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@l = common local_unnamed_addr global i32 0, align 4
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@j = common local_unnamed_addr global i32 0, align 4
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@k = common local_unnamed_addr global i32 0, align 4
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@i = common local_unnamed_addr global i32 0, align 4
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@d = common local_unnamed_addr global i32 0, align 4
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@c = common local_unnamed_addr global i32 0, align 4
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@e = common local_unnamed_addr global i32 0, align 4
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@h = common local_unnamed_addr global i32 0, align 4
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; Function Attrs: norecurse nounwind uwtable
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define void @n(i32 %o, i32* nocapture readonly %b) local_unnamed_addr #0 {
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entry:
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%0 = load i32, i32* @g, align 4, !tbaa !2
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%tobool = icmp eq i32 %0, 0
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br i1 %tobool, label %entry.if.end_crit_edge, label %if.then
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entry.if.end_crit_edge: ; preds = %entry
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%.pre = load i32, i32* @f, align 4, !tbaa !2
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br label %if.end
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if.then: ; preds = %entry
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store i32 0, i32* @f, align 4, !tbaa !2
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br label %if.end
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; DARWIN-NOT: Merging into block
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; LINUX: Merging into block
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if.end: ; preds = %entry.if.end_crit_edge, %if.then
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%1 = phi i32 [ %.pre, %entry.if.end_crit_edge ], [ 0, %if.then ]
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%cmp6 = icmp slt i32 %1, %o
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br i1 %cmp6, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %if.end
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%.pre7 = load i32, i32* @a, align 4, !tbaa !2
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%.pre8 = load i32, i32* @l, align 4, !tbaa !2
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%.pre9 = load i32, i32* @j, align 4, !tbaa !2
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%.pre10 = load i32, i32* @k, align 4, !tbaa !2
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%.pre11 = load i32, i32* @i, align 4, !tbaa !2
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br label %for.body
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for.body: ; preds = %if.end5, %for.body.lr.ph
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%2 = phi i32 [ %.pre11, %for.body.lr.ph ], [ %7, %if.end5 ]
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%3 = phi i32 [ %.pre10, %for.body.lr.ph ], [ %8, %if.end5 ]
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%4 = phi i32 [ %.pre9, %for.body.lr.ph ], [ %9, %if.end5 ]
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%5 = phi i32 [ %1, %for.body.lr.ph ], [ %inc, %if.end5 ]
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store i32 %.pre7, i32* @m, align 4, !tbaa !2
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%mul = mul nsw i32 %3, %4
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%cmp1 = icmp sgt i32 %.pre8, %mul
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%conv = zext i1 %cmp1 to i32
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%cmp2 = icmp slt i32 %2, %conv
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br i1 %cmp2, label %if.then4, label %if.end5
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if.then4: ; preds = %for.body
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%6 = load i32, i32* @d, align 4, !tbaa !2
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store i32 %6, i32* @k, align 4, !tbaa !2
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store i32 %6, i32* @i, align 4, !tbaa !2
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store i32 %6, i32* @j, align 4, !tbaa !2
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br label %if.end5
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if.end5: ; preds = %if.then4, %for.body
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%7 = phi i32 [ %6, %if.then4 ], [ %2, %for.body ]
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%8 = phi i32 [ %6, %if.then4 ], [ %3, %for.body ]
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%9 = phi i32 [ %6, %if.then4 ], [ %4, %for.body ]
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%10 = load i32, i32* @c, align 4, !tbaa !2
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%idxprom = sext i32 %10 to i64
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%arrayidx = getelementptr inbounds i32, i32* %b, i64 %idxprom
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%11 = load i32, i32* %arrayidx, align 4, !tbaa !2
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%12 = load i32, i32* @e, align 4, !tbaa !2
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%sub = sub nsw i32 %11, %12
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store i32 %sub, i32* @h, align 4, !tbaa !2
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%inc = add nsw i32 %5, 1
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store i32 %inc, i32* @f, align 4, !tbaa !2
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%exitcond = icmp eq i32 %inc, %o
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %if.end5, %if.end
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ret void
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}
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attributes #0 = { norecurse nounwind uwtable }
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!2 = !{!3, !3, i64 0}
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!3 = !{!"int", !4, i64 0}
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!4 = !{}
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