diff options
Diffstat (limited to 'test/Transforms/LoopVectorize/reverse_induction.ll')
| -rw-r--r-- | test/Transforms/LoopVectorize/reverse_induction.ll | 75 |
1 files changed, 72 insertions, 3 deletions
diff --git a/test/Transforms/LoopVectorize/reverse_induction.ll b/test/Transforms/LoopVectorize/reverse_induction.ll index f43f02bc3132a..65ef95dcb1210 100644 --- a/test/Transforms/LoopVectorize/reverse_induction.ll +++ b/test/Transforms/LoopVectorize/reverse_induction.ll @@ -5,7 +5,7 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3 ; Make sure consecutive vector generates correct negative indices. ; PR15882 -; CHECK: reverse_induction_i64 +; CHECK-LABEL: @reverse_induction_i64( ; CHECK: add <4 x i64> %[[SPLAT:.*]], <i64 0, i64 -1, i64 -2, i64 -3> ; CHECK: add <4 x i64> %[[SPLAT]], <i64 -4, i64 -5, i64 -6, i64 -7> @@ -29,7 +29,7 @@ loopend: ret i32 %inc.redux } -; CHECK: reverse_induction_i128 +; CHECK-LABEL: @reverse_induction_i128( ; CHECK: add <4 x i128> %[[SPLAT:.*]], <i128 0, i128 -1, i128 -2, i128 -3> ; CHECK: add <4 x i128> %[[SPLAT]], <i128 -4, i128 -5, i128 -6, i128 -7> define i32 @reverse_induction_i128(i128 %startval, i32 * %ptr) { @@ -52,7 +52,7 @@ loopend: ret i32 %inc.redux } -; CHECK: reverse_induction_i16 +; CHECK-LABEL: @reverse_induction_i16( ; CHECK: add <4 x i16> %[[SPLAT:.*]], <i16 0, i16 -1, i16 -2, i16 -3> ; CHECK: add <4 x i16> %[[SPLAT]], <i16 -4, i16 -5, i16 -6, i16 -7> @@ -77,3 +77,72 @@ loopend: } +@a = common global [1024 x i32] zeroinitializer, align 16 + +; We incorrectly transformed this loop into an empty one because we left the +; induction variable in i8 type and truncated the exit value 1024 to 0. +; int a[1024]; +; +; void fail() { +; int reverse_induction = 1023; +; unsigned char forward_induction = 0; +; while ((reverse_induction) >= 0) { +; forward_induction++; +; a[reverse_induction] = forward_induction; +; --reverse_induction; +; } +; } + +; CHECK-LABEL: @reverse_forward_induction_i64_i8( +; CHECK: vector.body +; CHECK: %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] +; CHECK: %normalized.idx = sub i64 %index, 0 +; CHECK: %reverse.idx = sub i64 1023, %normalized.idx +; CHECK: trunc i64 %index to i8 + +define void @reverse_forward_induction_i64_i8() { +entry: + br label %while.body + +while.body: + %indvars.iv = phi i64 [ 1023, %entry ], [ %indvars.iv.next, %while.body ] + %forward_induction.05 = phi i8 [ 0, %entry ], [ %inc, %while.body ] + %inc = add i8 %forward_induction.05, 1 + %conv = zext i8 %inc to i32 + %arrayidx = getelementptr inbounds [1024 x i32]* @a, i64 0, i64 %indvars.iv + store i32 %conv, i32* %arrayidx, align 4 + %indvars.iv.next = add i64 %indvars.iv, -1 + %0 = trunc i64 %indvars.iv to i32 + %cmp = icmp sgt i32 %0, 0 + br i1 %cmp, label %while.body, label %while.end + +while.end: + ret void +} + +; CHECK-LABEL: @reverse_forward_induction_i64_i8_signed( +; CHECK: vector.body: +; CHECK: %index = phi i64 [ 129, %vector.ph ], [ %index.next, %vector.body ] +; CHECK: %normalized.idx = sub i64 %index, 129 +; CHECK: %reverse.idx = sub i64 1023, %normalized.idx +; CHECK: trunc i64 %index to i8 + +define void @reverse_forward_induction_i64_i8_signed() { +entry: + br label %while.body + +while.body: + %indvars.iv = phi i64 [ 1023, %entry ], [ %indvars.iv.next, %while.body ] + %forward_induction.05 = phi i8 [ -127, %entry ], [ %inc, %while.body ] + %inc = add i8 %forward_induction.05, 1 + %conv = sext i8 %inc to i32 + %arrayidx = getelementptr inbounds [1024 x i32]* @a, i64 0, i64 %indvars.iv + store i32 %conv, i32* %arrayidx, align 4 + %indvars.iv.next = add i64 %indvars.iv, -1 + %0 = trunc i64 %indvars.iv to i32 + %cmp = icmp sgt i32 %0, 0 + br i1 %cmp, label %while.body, label %while.end + +while.end: + ret void +} |