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https://github.com/c64scene-ar/llvm-6502.git
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8c5c6f0e09
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185973 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
1.8 KiB
LLVM
76 lines
1.8 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @t1(i16 zeroext %x, i32 %y) nounwind {
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entry:
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; CHECK: t1
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; CHECK-NOT: sdiv
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; CHECK: lshr i32 %conv
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%conv = zext i16 %x to i32
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%s = shl i32 2, %y
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%d = sdiv i32 %conv, %s
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ret i32 %d
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}
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; rdar://11721329
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define i64 @t2(i64 %x, i32 %y) nounwind {
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; CHECK: t2
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; CHECK-NOT: udiv
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; CHECK: lshr i64 %x
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%1 = shl i32 1, %y
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%2 = zext i32 %1 to i64
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%3 = udiv i64 %x, %2
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ret i64 %3
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}
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; PR13250
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define i64 @t3(i64 %x, i32 %y) nounwind {
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; CHECK: t3
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; CHECK-NOT: udiv
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; CHECK-NEXT: %1 = add i32 %y, 2
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; CHECK-NEXT: %2 = zext i32 %1 to i64
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; CHECK-NEXT: %3 = lshr i64 %x, %2
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; CHECK-NEXT: ret i64 %3
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%1 = shl i32 4, %y
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%2 = zext i32 %1 to i64
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%3 = udiv i64 %x, %2
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ret i64 %3
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}
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define i32 @t4(i32 %x, i32 %y) nounwind {
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; CHECK: t4
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; CHECK-NOT: udiv
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %y, 5
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 5, i32 %y
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; CHECK-NEXT: [[SHR:%.*]] = lshr i32 %x, [[SEL]]
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; CHECK-NEXT: ret i32 [[SHR]]
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%1 = shl i32 1, %y
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%2 = icmp ult i32 %1, 32
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%3 = select i1 %2, i32 32, i32 %1
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%4 = udiv i32 %x, %3
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ret i32 %4
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}
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define i32 @t5(i1 %x, i1 %y, i32 %V) nounwind {
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; CHECK: t5
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; CHECK-NOT: udiv
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; CHECK-NEXT: [[SEL1:%.*]] = select i1 %x, i32 5, i32 6
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; CHECK-NEXT: [[LSHR:%.*]] = lshr i32 %V, [[SEL1]]
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 %y, i32 [[LSHR]], i32 0
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; CHECK-NEXT: ret i32 [[SEL2]]
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%1 = shl i32 1, %V
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%2 = select i1 %x, i32 32, i32 64
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%3 = select i1 %y, i32 %2, i32 %1
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%4 = udiv i32 %V, %3
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ret i32 %4
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}
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define i32 @t6(i32 %x, i32 %z) nounwind{
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; CHECK: t6
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %x, 0
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; CHECK-NOT: udiv i32 %z, %x
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%x_is_zero = icmp eq i32 %x, 0
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%divisor = select i1 %x_is_zero, i32 1, i32 %x
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%y = udiv i32 %z, %divisor
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ret i32 %y
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}
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