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author | Stephen Hines <srhines@google.com> | 2015-04-01 18:49:24 +0000 |
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committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2015-04-01 18:49:26 +0000 |
commit | 3fa16bd6062e23bcdb82ed4dd965674792e6b761 (patch) | |
tree | 9348fc507292f7e8715d22d64ce5a32131b4f875 /test/Transforms/StraightLineStrengthReduce/slsr.ll | |
parent | beed47390a60f6f0c77532b3d3f76bb47ef49423 (diff) | |
parent | ebe69fe11e48d322045d5949c83283927a0d790b (diff) | |
download | external_llvm-3fa16bd6062e23bcdb82ed4dd965674792e6b761.zip external_llvm-3fa16bd6062e23bcdb82ed4dd965674792e6b761.tar.gz external_llvm-3fa16bd6062e23bcdb82ed4dd965674792e6b761.tar.bz2 |
Merge "Update aosp/master LLVM for rebase to r230699."
Diffstat (limited to 'test/Transforms/StraightLineStrengthReduce/slsr.ll')
-rw-r--r-- | test/Transforms/StraightLineStrengthReduce/slsr.ll | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/test/Transforms/StraightLineStrengthReduce/slsr.ll b/test/Transforms/StraightLineStrengthReduce/slsr.ll new file mode 100644 index 0000000..951cbb0 --- /dev/null +++ b/test/Transforms/StraightLineStrengthReduce/slsr.ll @@ -0,0 +1,119 @@ +; RUN: opt < %s -slsr -gvn -dce -S | FileCheck %s + +declare i32 @foo(i32 %a) + +define i32 @slsr1(i32 %b, i32 %s) { +; CHECK-LABEL: @slsr1( + ; v0 = foo(b * s); + %mul0 = mul i32 %b, %s +; CHECK: mul i32 +; CHECK-NOT: mul i32 + %v0 = call i32 @foo(i32 %mul0) + + ; v1 = foo((b + 1) * s); + %b1 = add i32 %b, 1 + %mul1 = mul i32 %b1, %s + %v1 = call i32 @foo(i32 %mul1) + + ; v2 = foo((b + 2) * s); + %b2 = add i32 %b, 2 + %mul2 = mul i32 %b2, %s + %v2 = call i32 @foo(i32 %mul2) + + ; return v0 + v1 + v2; + %1 = add i32 %v0, %v1 + %2 = add i32 %1, %v2 + ret i32 %2 +} + +; v0 = foo(a * b) +; v1 = foo((a + 1) * b) +; v2 = foo(a * (b + 1)) +; v3 = foo((a + 1) * (b + 1)) +define i32 @slsr2(i32 %a, i32 %b) { +; CHECK-LABEL: @slsr2( + %a1 = add i32 %a, 1 + %b1 = add i32 %b, 1 + %mul0 = mul i32 %a, %b +; CHECK: mul i32 +; CHECK-NOT: mul i32 + %mul1 = mul i32 %a1, %b + %mul2 = mul i32 %a, %b1 + %mul3 = mul i32 %a1, %b1 + + %v0 = call i32 @foo(i32 %mul0) + %v1 = call i32 @foo(i32 %mul1) + %v2 = call i32 @foo(i32 %mul2) + %v3 = call i32 @foo(i32 %mul3) + + %1 = add i32 %v0, %v1 + %2 = add i32 %1, %v2 + %3 = add i32 %2, %v3 + ret i32 %3 +} + +; The bump is a multiple of the stride. +; +; v0 = foo(b * s); +; v1 = foo((b + 2) * s); +; v2 = foo((b + 4) * s); +; return v0 + v1 + v2; +; +; ==> +; +; mul0 = b * s; +; v0 = foo(mul0); +; bump = s * 2; +; mul1 = mul0 + bump; // GVN ensures mul1 and mul2 use the same bump. +; v1 = foo(mul1); +; mul2 = mul1 + bump; +; v2 = foo(mul2); +; return v0 + v1 + v2; +define i32 @slsr3(i32 %b, i32 %s) { +; CHECK-LABEL: @slsr3( + %mul0 = mul i32 %b, %s +; CHECK: mul i32 + %v0 = call i32 @foo(i32 %mul0) + + %b1 = add i32 %b, 2 + %mul1 = mul i32 %b1, %s +; CHECK: [[BUMP:%[a-zA-Z0-9]+]] = mul i32 %s, 2 +; CHECK: %mul1 = add i32 %mul0, [[BUMP]] + %v1 = call i32 @foo(i32 %mul1) + + %b2 = add i32 %b, 4 + %mul2 = mul i32 %b2, %s +; CHECK: %mul2 = add i32 %mul1, [[BUMP]] + %v2 = call i32 @foo(i32 %mul2) + + %1 = add i32 %v0, %v1 + %2 = add i32 %1, %v2 + ret i32 %2 +} + +; Do not rewrite a candidate if its potential basis does not dominate it. +; v0 = 0; +; if (cond) +; v0 = foo(a * b); +; v1 = foo((a + 1) * b); +; return v0 + v1; +define i32 @not_dominate(i1 %cond, i32 %a, i32 %b) { +; CHECK-LABEL: @not_dominate( +entry: + %a1 = add i32 %a, 1 + br i1 %cond, label %then, label %merge + +then: + %mul0 = mul i32 %a, %b +; CHECK: %mul0 = mul i32 %a, %b + %v0 = call i32 @foo(i32 %mul0) + br label %merge + +merge: + %v0.phi = phi i32 [ 0, %entry ], [ %mul0, %then ] + %mul1 = mul i32 %a1, %b +; CHECK: %mul1 = mul i32 %a1, %b + %v1 = call i32 @foo(i32 %mul1) + %sum = add i32 %v0.phi, %v1 + ret i32 %sum +} |