| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -passes=instcombine %s | FileCheck %s |
| |
| ; Eliminate the insertelement. |
| |
| define <4 x float> @PR29126(<4 x float> %x) { |
| ; CHECK-LABEL: @PR29126( |
| ; CHECK-NEXT: [[INS:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float poison, float 1.000000e+00, float 2.000000e+00, float 4.200000e+01>, <4 x i32> <i32 0, i32 5, i32 6, i32 7> |
| ; CHECK-NEXT: ret <4 x float> [[INS]] |
| ; |
| %shuf = shufflevector <4 x float> %x, <4 x float> <float poison, float 1.0, float 2.0, float poison>, <4 x i32> <i32 0, i32 5, i32 6, i32 3> |
| %ins = insertelement <4 x float> %shuf, float 42.0, i32 3 |
| ret <4 x float> %ins |
| } |
| |
| ; A chain of inserts should collapse. |
| |
| define <4 x float> @twoInserts(<4 x float> %x) { |
| ; CHECK-LABEL: @twoInserts( |
| ; CHECK-NEXT: [[INS2:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float poison, float 0.000000e+00, float 4.200000e+01, float 1.100000e+01>, <4 x i32> <i32 0, i32 5, i32 6, i32 7> |
| ; CHECK-NEXT: ret <4 x float> [[INS2]] |
| ; |
| %shuf = shufflevector <4 x float> %x, <4 x float> zeroinitializer, <4 x i32> <i32 0, i32 5, i32 6, i32 3> |
| %ins1 = insertelement <4 x float> %shuf, float 42.0, i32 2 |
| %ins2 = insertelement <4 x float> %ins1, float 11.0, i32 3 |
| ret <4 x float> %ins2 |
| } |
| |
| define <4 x i32> @shuffleRetain(<4 x i32> %base) { |
| ; CHECK-LABEL: @shuffleRetain( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[BASE:%.*]], <4 x i32> <i32 poison, i32 poison, i32 poison, i32 1>, <4 x i32> <i32 1, i32 2, i32 poison, i32 7> |
| ; CHECK-NEXT: ret <4 x i32> [[SHUF]] |
| ; |
| %shuf = shufflevector <4 x i32> %base, <4 x i32> <i32 4, i32 3, i32 2, i32 1>, <4 x i32> <i32 1, i32 2, i32 poison, i32 7> |
| ret <4 x i32> %shuf |
| } |
| |
| ; TODO: Transform an arbitrary shuffle with constant into a shuffle that is equivalant to a vector select. |
| |
| define <4 x float> @disguisedSelect(<4 x float> %x) { |
| ; CHECK-LABEL: @disguisedSelect( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float poison, float 1.000000e+00, float 2.000000e+00, float poison>, <4 x i32> <i32 poison, i32 6, i32 5, i32 3> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <4 x float> [[SHUF]], float 4.000000e+00, i64 0 |
| ; CHECK-NEXT: ret <4 x float> [[INS]] |
| ; |
| %shuf = shufflevector <4 x float> %x, <4 x float> <float poison, float 1.0, float 2.0, float 3.0>, <4 x i32> <i32 7, i32 6, i32 5, i32 3> |
| %ins = insertelement <4 x float> %shuf, float 4.0, i32 0 |
| ret <4 x float> %ins |
| } |
| |
| ; TODO: Fold arbitrary (non-select-equivalent) shuffles if the new shuffle would have the same shuffle mask. |
| |
| define <4 x float> @notSelectButNoMaskDifference(<4 x float> %x) { |
| ; CHECK-LABEL: @notSelectButNoMaskDifference( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float poison, float 1.000000e+00, float 2.000000e+00, float poison>, <4 x i32> <i32 1, i32 5, i32 6, i32 poison> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <4 x float> [[SHUF]], float 4.000000e+00, i64 3 |
| ; CHECK-NEXT: ret <4 x float> [[INS]] |
| ; |
| %shuf = shufflevector <4 x float> %x, <4 x float> <float poison, float 1.0, float 2.0, float 3.0>, <4 x i32> <i32 1, i32 5, i32 6, i32 3> |
| %ins = insertelement <4 x float> %shuf, float 4.0, i32 3 |
| ret <4 x float> %ins |
| } |
| |
| ; We purposely do not touch arbitrary (non-select-equivalent) shuffles because folding the insert may create a more expensive shuffle. |
| |
| define <4 x float> @tooRisky(<4 x float> %x) { |
| ; CHECK-LABEL: @tooRisky( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x float> [[X:%.*]], <4 x float> <float 1.000000e+00, float poison, float poison, float poison>, <4 x i32> <i32 1, i32 4, i32 4, i32 poison> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <4 x float> [[SHUF]], float 4.000000e+00, i64 3 |
| ; CHECK-NEXT: ret <4 x float> [[INS]] |
| ; |
| %shuf = shufflevector <4 x float> %x, <4 x float> <float 1.0, float poison, float poison, float poison>, <4 x i32> <i32 1, i32 4, i32 4, i32 4> |
| %ins = insertelement <4 x float> %shuf, float 4.0, i32 3 |
| ret <4 x float> %ins |
| } |
| |
| ; Don't transform insert to shuffle if the original shuffle is not removed. |
| ; TODO: Ease the one-use restriction if the insert scalar would simplify the shuffle to a full vector constant? |
| |
| define <3 x float> @twoShufUses(<3 x float> %x) { |
| ; CHECK-LABEL: @twoShufUses( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <3 x float> [[X:%.*]], <3 x float> <float poison, float 1.000000e+00, float 2.000000e+00>, <3 x i32> <i32 0, i32 4, i32 5> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <3 x float> [[SHUF]], float 4.200000e+01, i64 1 |
| ; CHECK-NEXT: [[ADD:%.*]] = fadd <3 x float> [[SHUF]], [[INS]] |
| ; CHECK-NEXT: ret <3 x float> [[ADD]] |
| ; |
| %shuf = shufflevector <3 x float> %x, <3 x float> <float poison, float 1.0, float 2.0>, <3 x i32> <i32 0, i32 4, i32 5> |
| %ins = insertelement <3 x float> %shuf, float 42.0, i2 1 |
| %add = fadd <3 x float> %shuf, %ins |
| ret <3 x float> %add |
| } |
| |
| ; The inserted scalar constant index is out-of-bounds for the shuffle vector constant. |
| |
| define <5 x i8> @longerMask(<3 x i8> %x) { |
| ; CHECK-LABEL: @longerMask( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <3 x i8> [[X:%.*]], <3 x i8> <i8 poison, i8 1, i8 poison>, <5 x i32> <i32 2, i32 1, i32 4, i32 poison, i32 poison> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <5 x i8> [[SHUF]], i8 42, i64 4 |
| ; CHECK-NEXT: ret <5 x i8> [[INS]] |
| ; |
| %shuf = shufflevector <3 x i8> %x, <3 x i8> <i8 poison, i8 1, i8 2>, <5 x i32> <i32 2, i32 1, i32 4, i32 3, i32 0> |
| %ins = insertelement <5 x i8> %shuf, i8 42, i17 4 |
| ret <5 x i8> %ins |
| } |
| |
| ; TODO: The inserted constant could get folded into the shuffle vector constant. |
| |
| define <3 x i8> @shorterMask(<5 x i8> %x) { |
| ; CHECK-LABEL: @shorterMask( |
| ; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <5 x i8> [[X:%.*]], <5 x i8> poison, <3 x i32> <i32 poison, i32 1, i32 4> |
| ; CHECK-NEXT: [[INS:%.*]] = insertelement <3 x i8> [[SHUF]], i8 42, i64 0 |
| ; CHECK-NEXT: ret <3 x i8> [[INS]] |
| ; |
| %shuf = shufflevector <5 x i8> %x, <5 x i8> <i8 poison, i8 1, i8 2, i8 3, i8 4>, <3 x i32> <i32 2, i32 1, i32 4> |
| %ins = insertelement <3 x i8> %shuf, i8 42, i21 0 |
| ret <3 x i8> %ins |
| } |
| |