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- ; RUN: opt < %s -gvn -S | FileCheck %s
- target 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"
- target triple = "i386-apple-darwin7"
- define i32 @test1(i32* %b, i32* %c) nounwind {
- ; CHECK-LABEL: @test1(
- entry:
- %g = alloca i32
- %t1 = icmp eq i32* %b, null
- br i1 %t1, label %bb, label %bb1
- bb:
- %t2 = load i32, i32* %c, align 4
- %t3 = add i32 %t2, 1
- store i32 %t3, i32* %g, align 4
- br label %bb2
- bb1: ; preds = %entry
- %t5 = load i32, i32* %b, align 4
- %t6 = add i32 %t5, 1
- store i32 %t6, i32* %g, align 4
- br label %bb2
- bb2: ; preds = %bb1, %bb
- %c_addr.0 = phi i32* [ %g, %bb1 ], [ %c, %bb ]
- %b_addr.0 = phi i32* [ %b, %bb1 ], [ %g, %bb ]
- %cv = load i32, i32* %c_addr.0, align 4
- %bv = load i32, i32* %b_addr.0, align 4
- ; CHECK: %bv = phi i32
- ; CHECK: %cv = phi i32
- ; CHECK-NOT: load
- ; CHECK: ret i32
- %ret = add i32 %cv, %bv
- ret i32 %ret
- }
- define i8 @test2(i1 %cond, i32* %b, i32* %c) nounwind {
- ; CHECK-LABEL: @test2(
- entry:
- br i1 %cond, label %bb, label %bb1
- bb:
- %b1 = bitcast i32* %b to i8*
- store i8 4, i8* %b1
- br label %bb2
- bb1:
- %c1 = bitcast i32* %c to i8*
- store i8 92, i8* %c1
- br label %bb2
- bb2:
- %d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
- %d1 = bitcast i32* %d to i8*
- %dv = load i8, i8* %d1
- ; CHECK: %dv = phi i8 [ 92, %bb1 ], [ 4, %bb ]
- ; CHECK-NOT: load
- ; CHECK: ret i8 %dv
- ret i8 %dv
- }
- define i32 @test3(i1 %cond, i32* %b, i32* %c) nounwind {
- ; CHECK-LABEL: @test3(
- entry:
- br i1 %cond, label %bb, label %bb1
- bb:
- %b1 = getelementptr i32, i32* %b, i32 17
- store i32 4, i32* %b1
- br label %bb2
- bb1:
- %c1 = getelementptr i32, i32* %c, i32 7
- store i32 82, i32* %c1
- br label %bb2
- bb2:
- %d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
- %i = phi i32 [ 7, %bb1 ], [ 17, %bb ]
- %d1 = getelementptr i32, i32* %d, i32 %i
- %dv = load i32, i32* %d1
- ; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
- ; CHECK-NOT: load
- ; CHECK: ret i32 %dv
- ret i32 %dv
- }
- ; PR5313
- define i32 @test4(i1 %cond, i32* %b, i32* %c) nounwind {
- ; CHECK-LABEL: @test4(
- entry:
- br i1 %cond, label %bb, label %bb1
- bb:
- store i32 4, i32* %b
- br label %bb2
- bb1:
- %c1 = getelementptr i32, i32* %c, i32 7
- store i32 82, i32* %c1
- br label %bb2
- bb2:
- %d = phi i32* [ %c, %bb1 ], [ %b, %bb ]
- %i = phi i32 [ 7, %bb1 ], [ 0, %bb ]
- %d1 = getelementptr i32, i32* %d, i32 %i
- %dv = load i32, i32* %d1
- ; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
- ; CHECK-NOT: load
- ; CHECK: ret i32 %dv
- ret i32 %dv
- }
- ; void test5(int N, double* G) {
- ; for (long j = 1; j < 1000; j++)
- ; G[j] = G[j] + G[j-1];
- ; }
- ;
- ; Should compile into one load in the loop.
- define void @test5(i32 %N, double* nocapture %G) nounwind ssp {
- ; CHECK-LABEL: @test5(
- bb.nph:
- br label %for.body
- for.body:
- %indvar = phi i64 [ 0, %bb.nph ], [ %tmp, %for.body ]
- %arrayidx6 = getelementptr double, double* %G, i64 %indvar
- %tmp = add i64 %indvar, 1
- %arrayidx = getelementptr double, double* %G, i64 %tmp
- %tmp3 = load double, double* %arrayidx
- %tmp7 = load double, double* %arrayidx6
- %add = fadd double %tmp3, %tmp7
- store double %add, double* %arrayidx
- %exitcond = icmp eq i64 %tmp, 999
- br i1 %exitcond, label %for.end, label %for.body
- ; CHECK: for.body:
- ; CHECK: phi double
- ; CHECK: load double
- ; CHECK-NOT: load double
- ; CHECK: br i1
- for.end:
- ret void
- }
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