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Diffstat (limited to 'test/CodeGen/X86/optimize-max-1.ll')
-rw-r--r-- | test/CodeGen/X86/optimize-max-1.ll | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/test/CodeGen/X86/optimize-max-1.ll b/test/CodeGen/X86/optimize-max-1.ll new file mode 100644 index 0000000..084e181 --- /dev/null +++ b/test/CodeGen/X86/optimize-max-1.ll @@ -0,0 +1,78 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | not grep cmov + +; LSR should be able to eliminate both smax and umax expressions +; in loop trip counts. + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" + +define void @fs(double* nocapture %p, i64 %n) nounwind { +entry: + %tmp = icmp slt i64 %n, 1 ; <i1> [#uses=1] + %smax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1] + br label %bb + +bb: ; preds = %bb, %entry + %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] + %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] + store double 0.000000e+00, double* %scevgep, align 8 + %0 = add i64 %i.0, 1 ; <i64> [#uses=2] + %exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb + ret void +} + +define void @bs(double* nocapture %p, i64 %n) nounwind { +entry: + %tmp = icmp sge i64 %n, 1 ; <i1> [#uses=1] + %smax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1] + br label %bb + +bb: ; preds = %bb, %entry + %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] + %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] + store double 0.000000e+00, double* %scevgep, align 8 + %0 = add i64 %i.0, 1 ; <i64> [#uses=2] + %exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb + ret void +} + +define void @fu(double* nocapture %p, i64 %n) nounwind { +entry: + %tmp = icmp eq i64 %n, 0 ; <i1> [#uses=1] + %umax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1] + br label %bb + +bb: ; preds = %bb, %entry + %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] + %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] + store double 0.000000e+00, double* %scevgep, align 8 + %0 = add i64 %i.0, 1 ; <i64> [#uses=2] + %exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb + ret void +} + +define void @bu(double* nocapture %p, i64 %n) nounwind { +entry: + %tmp = icmp ne i64 %n, 0 ; <i1> [#uses=1] + %umax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1] + br label %bb + +bb: ; preds = %bb, %entry + %i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2] + %scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1] + store double 0.000000e+00, double* %scevgep, align 8 + %0 = add i64 %i.0, 1 ; <i64> [#uses=2] + %exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb + ret void +} |