diff options
Diffstat (limited to 'llvm/test/Transforms/Reassociate/multistep.ll')
| -rw-r--r-- | llvm/test/Transforms/Reassociate/multistep.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/multistep.ll b/llvm/test/Transforms/Reassociate/multistep.ll new file mode 100644 index 00000000000..239ffe08227 --- /dev/null +++ b/llvm/test/Transforms/Reassociate/multistep.ll @@ -0,0 +1,35 @@ +; RUN: opt < %s -reassociate -S | FileCheck %s + +; Check that a*a*b+a*a*c is turned into a*(a*(b+c)). + +define i64 @multistep1(i64 %a, i64 %b, i64 %c) { +; CHECK-LABEL: @multistep1( +; CHECK-NEXT: [[REASS_ADD1:%.*]] = add i64 %c, %b +; CHECK-NEXT: [[REASS_MUL2:%.*]] = mul i64 %a, %a +; CHECK-NEXT: [[REASS_MUL:%.*]] = mul i64 [[REASS_MUL:%.*]]2, [[REASS_ADD1]] +; CHECK-NEXT: ret i64 [[REASS_MUL]] +; + %t0 = mul i64 %a, %b + %t1 = mul i64 %a, %t0 ; a*(a*b) + %t2 = mul i64 %a, %c + %t3 = mul i64 %a, %t2 ; a*(a*c) + %t4 = add i64 %t1, %t3 + ret i64 %t4 +} + +; Check that a*b+a*c+d is turned into a*(b+c)+d. + +define i64 @multistep2(i64 %a, i64 %b, i64 %c, i64 %d) { +; CHECK-LABEL: @multistep2( +; CHECK-NEXT: [[REASS_ADD:%.*]] = add i64 %c, %b +; CHECK-NEXT: [[REASS_MUL:%.*]] = mul i64 [[REASS_ADD]], %a +; CHECK-NEXT: [[T3:%.*]] = add i64 [[REASS_MUL]], %d +; CHECK-NEXT: ret i64 [[T3]] +; + %t0 = mul i64 %a, %b + %t1 = mul i64 %a, %c + %t2 = add i64 %t1, %d ; a*c+d + %t3 = add i64 %t0, %t2 ; a*b+(a*c+d) + ret i64 %t3 +} + |
