76 lines
1.8 KiB
LLVM
76 lines
1.8 KiB
LLVM
; RUN: opt -S -loop-vectorize -mtriple=x86_64-apple-darwin %s | FileCheck %s
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; Two mostly identical functions. The only difference is the presence of
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; fast-math flags on the second. The loop is a pretty simple reduction:
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; for (int i = 0; i < 32; ++i)
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; if (arr[i] != 42)
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; tot += arr[i];
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define double @sumIfScalar(double* nocapture readonly %arr) {
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; CHECK-LABEL: define double @sumIfScalar
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; CHECK-NOT: <2 x double>
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entry:
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br label %loop
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loop:
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%i = phi i32 [0, %entry], [%i.next, %next.iter]
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%tot = phi double [0.0, %entry], [%tot.next, %next.iter]
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%addr = getelementptr double, double* %arr, i32 %i
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%nextval = load double, double* %addr
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%tst = fcmp une double %nextval, 42.0
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br i1 %tst, label %do.add, label %no.add
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do.add:
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%tot.new = fadd double %tot, %nextval
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br label %next.iter
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no.add:
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br label %next.iter
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next.iter:
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%tot.next = phi double [%tot, %no.add], [%tot.new, %do.add]
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%i.next = add i32 %i, 1
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%again = icmp ult i32 %i.next, 32
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br i1 %again, label %loop, label %done
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done:
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ret double %tot.next
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}
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define double @sumIfVector(double* nocapture readonly %arr) {
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; CHECK-LABEL: define double @sumIfVector
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; CHECK: <2 x double>
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entry:
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br label %loop
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loop:
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%i = phi i32 [0, %entry], [%i.next, %next.iter]
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%tot = phi double [0.0, %entry], [%tot.next, %next.iter]
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%addr = getelementptr double, double* %arr, i32 %i
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%nextval = load double, double* %addr
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%tst = fcmp fast une double %nextval, 42.0
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br i1 %tst, label %do.add, label %no.add
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do.add:
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%tot.new = fadd fast double %tot, %nextval
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br label %next.iter
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no.add:
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br label %next.iter
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next.iter:
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%tot.next = phi double [%tot, %no.add], [%tot.new, %do.add]
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%i.next = add i32 %i, 1
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%again = icmp ult i32 %i.next, 32
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br i1 %again, label %loop, label %done
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done:
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ret double %tot.next
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}
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