derek.holloway
7502bf64a4
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66 lines
1.8 KiB
LLVM
66 lines
1.8 KiB
LLVM
; RUN: opt -passes=loop-vectorize -S < %s 2>&1 | FileCheck %s
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; Produced from test-case:
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;
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; void testGuardedInnerLoop(uint32_t *ptr, uint32_t denom, uint32_t numer, uint32_t outer_lim)
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; {
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; for(uint32_t outer_i = 0; outer_i < outer_lim; ++outer_i) {
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; if (denom > 0) {
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; const uint32_t lim = numer / denom;
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;
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; for (uint32_t i = 0; i < lim; ++i)
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; ptr[i] = 1;
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; }
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; }
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; }
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
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target triple = "x86_64-unknown-linux-gnu"
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define void @testGuardedInnerLoop(ptr %ptr, i32 %denom, i32 %numer, i32 %outer_lim) {
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entry:
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%cmp1 = icmp eq i32 %outer_lim, 0
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br i1 %cmp1, label %exit, label %loop1.preheader
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; Verify that a 'udiv' does not appear between the 'loop1.preheader' label, and
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; whatever label comes next.
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loop1.preheader:
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; CHECK-LABEL: loop1.preheader:
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; CHECK-NOT: udiv
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; CHECK-LABEL: :
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br label %loop1
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loop1:
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%outer_i = phi i32 [ %inc1, %loop2.exit ], [ 0, %loop1.preheader ]
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%0 = add i32 %denom, -1
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%1 = icmp ult i32 %0, %numer
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br i1 %1, label %loop2.preheader, label %loop2.exit
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; Verify that a 'udiv' does appear between the 'loop2.preheader' label, and
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; whatever label comes next.
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loop2.preheader:
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; CHECK-LABEL: loop2.preheader:
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; CHECK: udiv
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; CHECK-LABEL: :
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%lim = udiv i32 %numer, %denom
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%2 = zext i32 %lim to i64
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br label %loop2
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loop2:
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%indvar.loop2 = phi i64 [ 0, %loop2.preheader ], [ %indvar.loop2.next, %loop2 ]
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%arrayidx = getelementptr inbounds i32, ptr %ptr, i64 %indvar.loop2
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store i32 1, ptr %arrayidx, align 4
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%indvar.loop2.next = add nuw nsw i64 %indvar.loop2, 1
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%cmp2 = icmp ult i64 %indvar.loop2.next, %2
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br i1 %cmp2, label %loop2, label %loop2.exit
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loop2.exit:
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%inc1 = add nuw i32 %outer_i, 1
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%exitcond = icmp eq i32 %inc1, %outer_lim
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br i1 %exitcond, label %exit, label %loop1
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exit:
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ret void
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}
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