forked from OSchip/llvm-project
72 lines
2.1 KiB
LLVM
72 lines
2.1 KiB
LLVM
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; RUN: opt -loop-vectorize -pass-remarks=loop-vectorize -S < %s 2>&1 | FileCheck %s
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; FIXME: Check for -pass-remarks-missed and -pass-remarks-analysis output when
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; addAcyclicInnerLoop emits analysis.
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; Check that opt does not crash on such input:
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;
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; a, b, c;
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; fn1() {
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; while (b--) {
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; c = a;
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; switch (a & 3)
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; case 0:
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; do
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; case 3:
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; case 2:
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; case 1:
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; ;
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; while (--c)
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; ;
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; }
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; }
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@b = common global i32 0, align 4
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@a = common global i32 0, align 4
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@c = common global i32 0, align 4
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; CHECK-NOT: vectorized loop
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; CHECK-LABEL: fn1
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define i32 @fn1() {
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entry:
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%tmp2 = load i32, i32* @b, align 4
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%dec3 = add nsw i32 %tmp2, -1
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store i32 %dec3, i32* @b, align 4
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%tobool4 = icmp eq i32 %tmp2, 0
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br i1 %tobool4, label %while.end, label %while.body.lr.ph
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while.body.lr.ph: ; preds = %entry
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%tmp1 = load i32, i32* @a, align 4
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%and = and i32 %tmp1, 3
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%switch = icmp eq i32 %and, 0
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br label %while.body
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while.cond: ; preds = %do.cond
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%dec = add nsw i32 %dec7, -1
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%tobool = icmp eq i32 %dec7, 0
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br i1 %tobool, label %while.cond.while.end_crit_edge, label %while.body
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while.body: ; preds = %while.body.lr.ph, %while.cond
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%dec7 = phi i32 [ %dec3, %while.body.lr.ph ], [ %dec, %while.cond ]
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br i1 %switch, label %do.body, label %do.cond
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do.body: ; preds = %do.cond, %while.body
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%dec25 = phi i32 [ %dec2, %do.cond ], [ %tmp1, %while.body ]
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br label %do.cond
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do.cond: ; preds = %do.body, %while.body
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%dec26 = phi i32 [ %dec25, %do.body ], [ %tmp1, %while.body ]
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%dec2 = add nsw i32 %dec26, -1
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%tobool3 = icmp eq i32 %dec2, 0
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br i1 %tobool3, label %while.cond, label %do.body
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while.cond.while.end_crit_edge: ; preds = %while.cond
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store i32 0, i32* @c, align 4
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store i32 -1, i32* @b, align 4
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br label %while.end
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while.end: ; preds = %while.cond.while.end_crit_edge, %entry
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ret i32 undef
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}
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