diff --git a/llvm/test/Transforms/InstCombine/matrix-multiplication-negation.ll b/llvm/test/Transforms/InstCombine/matrix-multiplication-negation.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/matrix-multiplication-negation.ll
@@ -0,0 +1,120 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --force-update
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+define <2 x double> @test_negation_move_to_result(<6 x double> %a, <3 x double> %b) {
+; CHECK-LABEL: @test_negation_move_to_result(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <6 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <2 x double> @llvm.matrix.multiply.v2f64.v6f64.v3f64(<6 x double> [[A_NEG]], <3 x double> [[B:%.*]], i32 2, i32 3, i32 1)
+; CHECK-NEXT:    ret <2 x double> [[RES]]
+;
+  %a.neg = fneg <6 x double> %a
+  %res = tail call <2 x double> @llvm.matrix.multiply.v2f64.v6f64.v3f64(<6 x double> %a.neg, <3 x double> %b, i32 2, i32 3, i32 1)
+  ret <2 x double> %res
+}
+
+define <9 x double> @test_move_negation_to_second_operand(<27 x double> %a, <3 x double> %b) {
+; CHECK-LABEL: @test_move_negation_to_second_operand(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <27 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <9 x double> @llvm.matrix.multiply.v9f64.v27f64.v3f64(<27 x double> [[A_NEG]], <3 x double> [[B:%.*]], i32 9, i32 3, i32 1)
+; CHECK-NEXT:    ret <9 x double> [[RES]]
+;
+  %a.neg = fneg <27 x double> %a
+  %res = tail call <9 x double> @llvm.matrix.multiply.v9f64.v27f64.v3f64(<27 x double> %a.neg, <3 x double> %b, i32 9, i32 3, i32 1)
+  ret <9 x double> %res
+}
+
+define <15 x double> @test_negation_not_moved(<3 x double> %a, <5 x double> %b) {
+; CHECK-LABEL: @test_negation_not_moved(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <3 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> [[A_NEG]], <5 x double> [[B:%.*]], i32 3, i32 1, i32 5)
+; CHECK-NEXT:    ret <15 x double> [[RES]]
+;
+  %a.neg = fneg <3 x double> %a
+  %res = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> %a.neg, <5 x double> %b, i32 3, i32 1, i32 5)
+  ret <15 x double> %res
+}
+
+define <15 x double> @test_negation_on_result(<3 x double> %a, <5 x double> %b) {
+; CHECK-LABEL: @test_negation_on_result(
+; CHECK-NEXT:    [[RES:%.*]] = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> [[A:%.*]], <5 x double> [[B:%.*]], i32 3, i32 1, i32 5)
+; CHECK-NEXT:    [[RES_2:%.*]] = fneg <15 x double> [[RES]]
+; CHECK-NEXT:    ret <15 x double> [[RES_2]]
+;
+  %res = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> %a, <5 x double> %b, i32 3, i32 1, i32 5)
+  %res.2 = fneg <15 x double> %res
+  ret <15 x double> %res.2
+}
+
+define <2 x double> @test_with_two_operands_negated1(<6 x double> %a, <3 x double> %b){
+; CHECK-LABEL: @test_with_two_operands_negated1(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <6 x double> [[A:%.*]]
+; CHECK-NEXT:    [[B_NEG:%.*]] = fneg <3 x double> [[B:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <2 x double> @llvm.matrix.multiply.v2f64.v6f64.v3f64(<6 x double> [[A_NEG]], <3 x double> [[B_NEG]], i32 2, i32 3, i32 1)
+; CHECK-NEXT:    ret <2 x double> [[RES]]
+;
+  %a.neg = fneg <6 x double> %a
+  %b.neg = fneg <3 x double> %b
+  %res = tail call <2 x double> @llvm.matrix.multiply.v2f64.v6f64.v3f64(<6 x double> %a.neg, <3 x double> %b.neg, i32 2, i32 3, i32 1)
+  ret <2 x double> %res
+}
+
+define <9 x double> @test_with_two_operands_negated2(<27 x double> %a, <3 x double> %b){
+; CHECK-LABEL: @test_with_two_operands_negated2(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <27 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <9 x double> @llvm.matrix.multiply.v9f64.v27f64.v3f64(<27 x double> [[A_NEG]], <3 x double> [[B:%.*]], i32 9, i32 3, i32 1)
+; CHECK-NEXT:    ret <9 x double> [[RES]]
+;
+  %a.neg = fneg <27 x double> %a
+  %b.neg = fneg <3 x double> %b
+  %res = tail call <9 x double> @llvm.matrix.multiply.v9f64.v27f64.v3f64(<27 x double> %a.neg, <3 x double> %b, i32 9, i32 3, i32 1)
+  ret <9 x double> %res
+}
+
+define <12 x double> @fneg_with_multiple_uses(<15 x double> %a, <20 x double> %b){
+; CHECK-LABEL: @fneg_with_multiple_uses(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <15 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <12 x double> @llvm.matrix.multiply.v12f64.v15f64.v20f64(<15 x double> [[A_NEG]], <20 x double> [[B:%.*]], i32 3, i32 5, i32 4)
+; CHECK-NEXT:    [[RES_2:%.*]] = shufflevector <15 x double> [[A_NEG]], <15 x double> undef, <12 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11>
+; CHECK-NEXT:    [[RES_3:%.*]] = fadd <12 x double> [[RES_2]], [[RES]]
+; CHECK-NEXT:    ret <12 x double> [[RES_3]]
+;
+  %a.neg = fneg <15 x double> %a
+  %res = tail call <12 x double> @llvm.matrix.multiply.v12f64.v15f64.v20f64(<15 x double> %a.neg, <20 x double> %b, i32 3, i32 5, i32 4)
+  %res.2 = shufflevector <15 x double> %a.neg, <15 x double> undef,
+  <12 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11>
+  %res.3 = fadd <12 x double> %res.2, %res
+  ret <12 x double> %res.3
+}
+
+define <15 x double> @chain_of_matrix_mutliplies(<3 x double> %a, <5 x double> %b, <35 x double> %c) {
+; CHECK-LABEL: @chain_of_matrix_mutliplies(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <3 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> [[A_NEG]], <5 x double> [[B:%.*]], i32 3, i32 1, i32 5)
+; CHECK-NEXT:    ret <15 x double> [[RES]]
+;
+  %a.neg = fneg <3 x double> %a
+  %res = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> %a.neg, <5 x double> %b, i32 3, i32 1, i32 5)
+  %res.2 = tail call <21 x double> @llvm.matrix.multiply.v21f64.v15f64.v35f64(<15 x double> %res, <35 x double> %c, i32 3, i32 5, i32 7)
+  ret <15 x double> %res
+}
+
+define <6 x double> @chain_of_matrix_mutliplies_with_two_negations(<3 x double> %a, <5 x double> %b, <10 x double> %c) {
+; CHECK-LABEL: @chain_of_matrix_mutliplies_with_two_negations(
+; CHECK-NEXT:    [[A_NEG:%.*]] = fneg <3 x double> [[A:%.*]]
+; CHECK-NEXT:    [[RES:%.*]] = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> [[A_NEG]], <5 x double> [[B:%.*]], i32 3, i32 1, i32 5)
+; CHECK-NEXT:    [[RES_2:%.*]] = tail call <6 x double> @llvm.matrix.multiply.v6f64.v15f64.v10f64(<15 x double> [[RES]], <10 x double> [[C:%.*]], i32 3, i32 5, i32 2)
+; CHECK-NEXT:    ret <6 x double> [[RES_2]]
+;
+  %a.neg = fneg <3 x double> %a
+  %res = tail call <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double> %a.neg, <5 x double> %b, i32 3, i32 1, i32 5)
+  %res.neg = fneg <15 x double> %res
+  %res.2 = tail call <6 x double> @llvm.matrix.multiply.v6f64.v15f64.v10f64(<15 x double> %res, <10 x double> %c, i32 3, i32 5, i32 2)
+  ret <6 x double> %res.2
+}
+
+declare <2 x double> @llvm.matrix.multiply.v2f64.v6f64.v3f64(<6 x double>, <3 x double>, i32 immarg, i32 immarg, i32 immarg) #1
+declare <9 x double> @llvm.matrix.multiply.v9f64.v27f64.v3f64(<27 x double>, <3 x double>, i32 immarg, i32 immarg, i32 immarg) #1
+declare <15 x double> @llvm.matrix.multiply.v15f64.v3f64.v5f64(<3 x double>, <5 x double>, i32 immarg, i32 immarg, i32 immarg) #1
+declare <12 x double> @llvm.matrix.multiply.v12f64.v15f64.v20f64(<15 x double>, <20 x double>, i32 immarg, i32 immarg, i32 immarg) #1
+declare <21 x double> @llvm.matrix.multiply.v21f64.v15f64.v35f64(<15 x double>, <35 x double>, i32 immarg, i32 immarg, i32 immarg) #1
+declare <6 x double> @llvm.matrix.multiply.v6f64.v15f64.v10f64(<15 x double>, <10 x double>, i32 immarg, i32 immarg, i32 immarg) #1