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https://github.com/c64scene-ar/llvm-6502.git
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d36076e4a3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84431 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=x86-64 -asm-verbose=false | FileCheck %s
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; Currently, floating-point selects are lowered to CFG triangles.
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; This means that one side of the select is always unconditionally
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; evaluated, however with MachineSink we can sink the other side so
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; that it's conditionally evaluated.
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; CHECK: foo:
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; CHECK: divsd
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; CHECK-NEXT: testb $1, %dil
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; CHECK-NEXT: jne
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; CHECK-NEXT: divsd
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define double @foo(double %x, double %y, i1 %c) nounwind {
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%a = fdiv double %x, 3.2
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%b = fdiv double %y, 3.3
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%z = select i1 %c, double %a, double %b
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ret double %z
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}
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; Hoist floating-point constant-pool loads out of loops.
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; CHECK: bar:
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; CHECK: movsd
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; CHECK: align
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define void @bar(double* nocapture %p, i64 %n) nounwind {
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entry:
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%0 = icmp sgt i64 %n, 0
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br i1 %0, label %bb, label %return
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bb:
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%i.03 = phi i64 [ 0, %entry ], [ %3, %bb ]
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%scevgep = getelementptr double* %p, i64 %i.03
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%1 = load double* %scevgep, align 8
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%2 = fdiv double 3.200000e+00, %1
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store double %2, double* %scevgep, align 8
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%3 = add nsw i64 %i.03, 1
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%exitcond = icmp eq i64 %3, %n
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br i1 %exitcond, label %return, label %bb
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return:
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ret void
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}
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