# RUN: %stinkytofu-opt --arch gfx1250 %s --BuildUseDefChainPass --PeepholeOptimizationPass --print-output
#
# MUL+MUL Fusion: v_mul + v_mul with constants → single v_mul with multiplied constant.
# Converted from PeepholeOptimizationPassTest.*MULMUL*

#--- F32 basic: 2.0 * 3.0 = 6.0
# CHECK-LABEL: @mul_mul_f32_basic
# CHECK: v_mul_f32
# CHECK-SAME: v2
# CHECK-SAME: 6
# CHECK-SAME: v1
# CHECK-NOT: v_mul_f32

st.func @mul_mul_f32_basic() {
^entry:
  v0 = "st.v_mul_f32"(2.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f32"(3.0, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- F32 in-place: 2.0 * 3.0 = 6.0
# CHECK-LABEL: @mul_mul_f32_inplace
# CHECK: v_mul_f32
# CHECK-SAME: v0
# CHECK-SAME: 6
# CHECK-SAME: v1
# CHECK-NOT: v_mul_f32

st.func @mul_mul_f32_inplace() {
^entry:
  v0 = "st.v_mul_f32"(2.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v0 = "st.v_mul_f32"(3.0, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- F16 basic: 2.5 * 4.0 = 10.0
# CHECK-LABEL: @mul_mul_f16_basic
# CHECK: v_mul_f16
# CHECK-SAME: v2
# CHECK-SAME: 10
# CHECK-SAME: v1
# CHECK-NOT: v_mul_f16

st.func @mul_mul_f16_basic() {
^entry:
  v0 = "st.v_mul_f16"(2.5, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f16"(4.0, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- Negative: first MUL result has multiple uses → no fusion
# CHECK-LABEL: @no_fusion_mul_multiple_uses
# CHECK: v_mul_f32
# CHECK: v_mul_f32
# CHECK: v_mul_f32

st.func @no_fusion_mul_multiple_uses() {
^entry:
  v0 = "st.v_mul_f32"(2.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f32"(3.0, v0) { issueCycles = 1, latencyCycles = 5 }
  v3 = "st.v_mul_f32"(4.0, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- Negative: second MUL has no constant → no fusion
# CHECK-LABEL: @no_fusion_mul_missing_const
# CHECK: v_mul_f32
# CHECK: v_mul_f32

st.func @no_fusion_mul_missing_const() {
^entry:
  v0 = "st.v_mul_f32"(2.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f32"(v3, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- With zero: 5.0 * 0.0 = 0.0
# CHECK-LABEL: @mul_mul_with_zero
# CHECK: v_mul_f32
# CHECK-SAME: v2
# CHECK-SAME: 0
# CHECK-SAME: v1
# CHECK-NOT: v_mul_f32

st.func @mul_mul_with_zero() {
^entry:
  v0 = "st.v_mul_f32"(5.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f32"(0.0, v0) { issueCycles = 1, latencyCycles = 5 }
}

#--- Negative values: -2.0 * 3.0 = -6.0
# CHECK-LABEL: @mul_mul_negative
# CHECK: v_mul_f32
# CHECK-SAME: v2
# CHECK-SAME: -6
# CHECK-SAME: v1
# CHECK-NOT: v_mul_f32

st.func @mul_mul_negative() {
^entry:
  v0 = "st.v_mul_f32"(-2.0, v1) { issueCycles = 1, latencyCycles = 5 }
  v2 = "st.v_mul_f32"(3.0, v0) { issueCycles = 1, latencyCycles = 5 }
}