| ; RUN: opt < %s -loop-reduce -S | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @a = global i32 0, align 4 |
| @b = global i8 0, align 1 |
| @c = global [4 x i8] zeroinitializer, align 1 |
| |
| ; Just make sure we don't generate code with uses not dominated by defs. |
| ; CHECK-LABEL: @main( |
| define i32 @main() { |
| entry: |
| %a0 = load i32, i32* @a, align 4 |
| %cmpa = icmp slt i32 %a0, 4 |
| br i1 %cmpa, label %preheader, label %for.end |
| |
| preheader: |
| %b0 = load i8, i8* @b, align 1 |
| %b0sext = sext i8 %b0 to i64 |
| br label %for.body |
| |
| for.body: |
| %iv = phi i64 [ 0, %preheader ], [ %iv.next, %lor.false ] |
| %mul = mul nsw i64 %b0sext, %iv |
| %multrunc = trunc i64 %mul to i32 |
| %cmp = icmp eq i32 %multrunc, 0 |
| br i1 %cmp, label %lor.false, label %if.then |
| |
| lor.false: |
| %cgep = getelementptr inbounds [4 x i8], [4 x i8]* @c, i64 0, i64 %iv |
| %ci = load i8, i8* %cgep, align 1 |
| %cisext = sext i8 %ci to i32 |
| %ivtrunc = trunc i64 %iv to i32 |
| %cmp2 = icmp eq i32 %cisext, %ivtrunc |
| %iv.next = add i64 %iv, 1 |
| br i1 %cmp2, label %for.body, label %if.then |
| |
| if.then: |
| tail call void @abort() |
| unreachable |
| |
| for.end: |
| ret i32 0 |
| } |
| |
| declare void @abort() |
