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186 lines
5.9 KiB
LLVM
186 lines
5.9 KiB
LLVM
; RUN: opt -reassociate -gvn -S < %s | FileCheck %s
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; (x + 0.1234 * y) * (x + -0.1234 * y) -> (x + 0.1234 * y) * (x - 0.1234 * y)
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define double @test1(double %x, double %y) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD:%.*]] = fadd double %x, [[MUL]]
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; CHECK-NEXT: [[ADD21:%.*]] = fsub double %x, [[MUL]]
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; CHECK-NEXT: [[MUL3:%.*]] = fmul double [[ADD]], [[ADD21]]
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; CHECK-NEXT: ret double [[MUL3]]
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;
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%mul = fmul double 1.234000e-01, %y
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%add = fadd double %mul, %x
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%mul1 = fmul double -1.234000e-01, %y
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%add2 = fadd double %mul1, %x
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; (x + -0.1234 * y) * (x + -0.1234 * y) -> (x - 0.1234 * y) * (x - 0.1234 * y)
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define double @test2(double %x, double %y) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD1:%.*]] = fsub double %x, [[MUL]]
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; CHECK-NEXT: [[MUL3:%.*]] = fmul double [[ADD1]], [[ADD1]]
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; CHECK-NEXT: ret double [[MUL3]]
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;
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%mul = fmul double %y, -1.234000e-01
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%add = fadd double %mul, %x
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%mul1 = fmul double %y, -1.234000e-01
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%add2 = fadd double %mul1, %x
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; (x + 0.1234 * y) * (x - -0.1234 * y) -> (x + 0.1234 * y) * (x + 0.1234 * y)
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define double @test3(double %x, double %y) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD:%.*]] = fadd double %x, [[MUL]]
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; CHECK-NEXT: [[MUL3:%.*]] = fmul double [[ADD]], [[ADD]]
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; CHECK-NEXT: ret double [[MUL3]]
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;
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%mul = fmul double %y, 1.234000e-01
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%add = fadd double %mul, %x
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%mul1 = fmul double %y, -1.234000e-01
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%add2 = fsub double %x, %mul1
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%mul3 = fmul double %add, %add2
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ret double %mul3
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}
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; Canonicalize (x - -0.1234 * y)
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define double @test5(double %x, double %y) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[SUB1:%.*]] = fadd double %x, [[MUL]]
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; CHECK-NEXT: ret double [[SUB1]]
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;
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%mul = fmul double -1.234000e-01, %y
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%sub = fsub double %x, %mul
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ret double %sub
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}
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; Don't modify (-0.1234 * y - x)
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define double @test6(double %x, double %y) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, -1.234000e-01
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; CHECK-NEXT: [[SUB:%.*]] = fsub double [[MUL]], %x
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; CHECK-NEXT: ret double [[SUB]]
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;
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%mul = fmul double -1.234000e-01, %y
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%sub = fsub double %mul, %x
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ret double %sub
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}
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; Canonicalize (-0.1234 * y + x) -> (x - 0.1234 * y)
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define double @test7(double %x, double %y) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD1:%.*]] = fsub double %x, [[MUL]]
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; CHECK-NEXT: ret double [[ADD1]]
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;
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%mul = fmul double -1.234000e-01, %y
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%add = fadd double %mul, %x
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ret double %add
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}
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; Canonicalize (y * -0.1234 + x) -> (x - 0.1234 * y)
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define double @test8(double %x, double %y) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[MUL:%.*]] = fmul double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD1:%.*]] = fsub double %x, [[MUL]]
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; CHECK-NEXT: ret double [[ADD1]]
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;
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%mul = fmul double %y, -1.234000e-01
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%add = fadd double %mul, %x
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ret double %add
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}
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; Canonicalize (x - -0.1234 / y)
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define double @test9(double %x, double %y) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[DIV:%.*]] = fdiv double 1.234000e-01, %y
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; CHECK-NEXT: [[SUB1:%.*]] = fadd double %x, [[DIV]]
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; CHECK-NEXT: ret double [[SUB1]]
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;
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%div = fdiv double -1.234000e-01, %y
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%sub = fsub double %x, %div
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ret double %sub
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}
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; Don't modify (-0.1234 / y - x)
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define double @test10(double %x, double %y) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[DIV:%.*]] = fdiv double -1.234000e-01, %y
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; CHECK-NEXT: [[SUB:%.*]] = fsub double [[DIV]], %x
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; CHECK-NEXT: ret double [[SUB]]
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;
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%div = fdiv double -1.234000e-01, %y
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%sub = fsub double %div, %x
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ret double %sub
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}
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; Canonicalize (-0.1234 / y + x) -> (x - 0.1234 / y)
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define double @test11(double %x, double %y) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[DIV:%.*]] = fdiv double 1.234000e-01, %y
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; CHECK-NEXT: [[ADD1:%.*]] = fsub double %x, [[DIV]]
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; CHECK-NEXT: ret double [[ADD1]]
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;
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%div = fdiv double -1.234000e-01, %y
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%add = fadd double %div, %x
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ret double %add
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}
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; Canonicalize (y / -0.1234 + x) -> (x - y / 0.1234)
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define double @test12(double %x, double %y) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[DIV:%.*]] = fdiv double %y, 1.234000e-01
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; CHECK-NEXT: [[ADD1:%.*]] = fsub double %x, [[DIV]]
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; CHECK-NEXT: ret double [[ADD1]]
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;
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%div = fdiv double %y, -1.234000e-01
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%add = fadd double %div, %x
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ret double %add
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}
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; Don't create an NSW violation
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define i4 @test13(i4 %x) {
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: [[MUL:%.*]] = mul nsw i4 %x, -2
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; CHECK-NEXT: [[ADD:%.*]] = add i4 [[MUL]], 3
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; CHECK-NEXT: ret i4 [[ADD]]
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;
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%mul = mul nsw i4 %x, -2
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%add = add i4 %mul, 3
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ret i4 %add
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}
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; This tests used to cause an infinite loop where we would loop between
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; canonicalizing the negated constant (i.e., (X + Y*-5.0) -> (X - Y*5.0)) and
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; breaking up a subtract (i.e., (X - Y*5.0) -> X + (0 - Y*5.0)). To break the
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; cycle, we don't canonicalize the negative constant if we're going to later
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; break up the subtract.
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;
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; Check to make sure we don't canonicalize
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; (%pow2*-5.0 + %sub) -> (%sub - %pow2*5.0)
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; as we would later break up this subtract causing a cycle.
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define double @pr34078(double %A) {
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; CHECK-LABEL: @pr34078(
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; CHECK-NEXT: [[SUB:%.*]] = fsub fast double 1.000000e+00, %A
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; CHECK-NEXT: [[POW2:%.*]] = fmul double %A, %A
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; CHECK-NEXT: [[MUL5_NEG:%.*]] = fmul fast double [[POW2]], -5.000000e-01
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; CHECK-NEXT: [[SUB1:%.*]] = fadd fast double [[MUL5_NEG]], [[SUB]]
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; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast double [[SUB1]], 2.000000e+00
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; CHECK-NEXT: ret double [[FACTOR]]
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;
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%sub = fsub fast double 1.000000e+00, %A
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%pow2 = fmul double %A, %A
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%mul5 = fmul fast double %pow2, 5.000000e-01
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%sub1 = fsub fast double %sub, %mul5
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%add = fadd fast double %sub1, %sub1
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ret double %add
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}
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