143 lines · plain
1; RUN: opt < %s -S -passes=gvn | FileCheck %s2 3target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"4 5define i32 @test1(ptr %b, ptr %c) nounwind {6; CHECK-LABEL: @test1(7entry:8 %g = alloca i329 %t1 = icmp eq ptr %b, null10 br i1 %t1, label %bb, label %bb111 12bb:13 %t2 = load i32, ptr %c, align 414 %t3 = add i32 %t2, 115 store i32 %t3, ptr %g, align 416 br label %bb217 18bb1: ; preds = %entry19 %t5 = load i32, ptr %b, align 420 %t6 = add i32 %t5, 121 store i32 %t6, ptr %g, align 422 br label %bb223 24bb2: ; preds = %bb1, %bb25 %c_addr.0 = phi ptr [ %g, %bb1 ], [ %c, %bb ]26 %b_addr.0 = phi ptr [ %b, %bb1 ], [ %g, %bb ]27 %cv = load i32, ptr %c_addr.0, align 428 %bv = load i32, ptr %b_addr.0, align 429; CHECK: %bv = phi i3230; CHECK: %cv = phi i3231; CHECK-NOT: load32; CHECK: ret i3233 %ret = add i32 %cv, %bv34 ret i32 %ret35}36 37define i8 @test2(i1 %cond, ptr %b, ptr %c) nounwind {38; CHECK-LABEL: @test2(39entry:40 br i1 %cond, label %bb, label %bb141 42bb:43 store i8 4, ptr %b44 br label %bb245 46bb1:47 store i8 92, ptr %c48 br label %bb249 50bb2:51 %d = phi ptr [ %c, %bb1 ], [ %b, %bb ]52 %dv = load i8, ptr %d53; CHECK: %dv = phi i8 [ 92, %bb1 ], [ 4, %bb ]54; CHECK-NOT: load55; CHECK: ret i8 %dv56 ret i8 %dv57}58 59define i32 @test3(i1 %cond, ptr %b, ptr %c) nounwind {60; CHECK-LABEL: @test3(61entry:62 br i1 %cond, label %bb, label %bb163 64bb:65 %b1 = getelementptr i32, ptr %b, i32 1766 store i32 4, ptr %b167 br label %bb268 69bb1:70 %c1 = getelementptr i32, ptr %c, i32 771 store i32 82, ptr %c172 br label %bb273 74bb2:75 %d = phi ptr [ %c, %bb1 ], [ %b, %bb ]76 %i = phi i32 [ 7, %bb1 ], [ 17, %bb ]77 %d1 = getelementptr i32, ptr %d, i32 %i78 %dv = load i32, ptr %d179; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]80; CHECK-NOT: load81; CHECK: ret i32 %dv82 ret i32 %dv83}84 85; PR531386define i32 @test4(i1 %cond, ptr %b, ptr %c) nounwind {87; CHECK-LABEL: @test4(88entry:89 br i1 %cond, label %bb, label %bb190 91bb:92 store i32 4, ptr %b93 br label %bb294 95bb1:96 %c1 = getelementptr i32, ptr %c, i32 797 store i32 82, ptr %c198 br label %bb299 100bb2:101 %d = phi ptr [ %c, %bb1 ], [ %b, %bb ]102 %i = phi i32 [ 7, %bb1 ], [ 0, %bb ]103 %d1 = getelementptr i32, ptr %d, i32 %i104 %dv = load i32, ptr %d1105; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]106; CHECK-NOT: load107; CHECK: ret i32 %dv108 ret i32 %dv109}110 111 112 113; void test5(int N, ptr G) {114; for (long j = 1; j < 1000; j++)115; G[j] = G[j] + G[j-1];116; }117;118; Should compile into one load in the loop.119define void @test5(i32 %N, ptr nocapture %G) nounwind ssp {120; CHECK-LABEL: @test5(121bb.nph:122 br label %for.body123 124for.body:125 %indvar = phi i64 [ 0, %bb.nph ], [ %tmp, %for.body ]126 %arrayidx6 = getelementptr double, ptr %G, i64 %indvar127 %tmp = add i64 %indvar, 1128 %arrayidx = getelementptr double, ptr %G, i64 %tmp129 %tmp3 = load double, ptr %arrayidx130 %tmp7 = load double, ptr %arrayidx6131 %add = fadd double %tmp3, %tmp7132 store double %add, ptr %arrayidx133 %exitcond = icmp eq i64 %tmp, 999134 br i1 %exitcond, label %for.end, label %for.body135; CHECK: for.body:136; CHECK: phi double137; CHECK: load double138; CHECK-NOT: load double139; CHECK: br i1140for.end:141 ret void142}143